diff --git a/.brackets.json b/.brackets.json new file mode 100644 index 0000000..abceceb --- /dev/null +++ b/.brackets.json @@ -0,0 +1,3 @@ +{ + "sbruchmann.staticpreview.basepath": "/home/carto/Projects/crankshaft/" +} \ No newline at end of file diff --git a/NEWS.md b/NEWS.md index c9187f7..791cc50 100644 --- a/NEWS.md +++ b/NEWS.md @@ -1,3 +1,10 @@ +0.4.0 (2016-08-30) +------------------ +* Add CDB_Contour +* Add CDB_PIA +* Add CDB_Densify +* Add CDB_TINmap + 0.3.1 (2016-08-18) ------------------ * Fix Voronoi projection issue diff --git a/RELEASE.md b/RELEASE.md index 6f09042..3ed577a 100644 --- a/RELEASE.md +++ b/RELEASE.md @@ -15,11 +15,12 @@ shall be performed by the designated *Release Manager*. 1. Generate an upgrade path from the previous to the next release by copying the generated release file. E.g: ```shell - cp release/cranckshaft--X.Y.Z.sql release/cranckshaft--A.B.C--X.Y.Z.sql + cp release/crankshaft--X.Y.Z.sql release/crankshaft--A.B.C--X.Y.Z.sql ``` NOTE: you can rely on this thanks to the compatibility checks. TODO: automate this step [#94](https://github.com/CartoDB/crankshaft/issues/94) +2. Update the [NEWS.md](https://github.com/CartoDB/crankshaft/blob/master/NEWS.md) file 1. Commit and push the generated files. 1. Tag the release: @@ -29,7 +30,6 @@ shall be performed by the designated *Release Manager*. ``` 1. Deploy and test in staging 1. Deploy and test in production -2. Update the [NEWS.md](https://github.com/CartoDB/crankshaft/blob/master/NEWS.md) file 1. Merge back into develop diff --git a/doc/13_PIA.md b/doc/13_PIA.md new file mode 100644 index 0000000..c8986e2 --- /dev/null +++ b/doc/13_PIA.md @@ -0,0 +1,33 @@ +## Pole of inaccessibility (PIA) + +Function to find the [PIA](https://en.wikipedia.org/wiki/Pole_of_inaccessibility) from a given polygon and tolerance, following the quadtree approach by [Vladimir Agafonkin](https://github.com/mourner) described [here](https://github.com/mapbox/polylabel) + + + +### CDB_PIA (polygon geometry, tolerance numeric DEFAULT 1.0) + +#### Arguments + +| Name | Type | Description | +|------|------|-------------| +| polygon | geometry | Target polygon | +| tolerance | numeric | Threshold to decide to take a cell into account | + +### Returns + +| Column Name | Type | Description | +|-------------|------|-------------| +| point | geometry| Pole of inaccessibility | + + +#### Example Usage + +```sql +with a as( + select st_geomfromtext('POLYGON((-432540.453078056 4949775.20452642,-432329.947920966 4951361.232584,-431245.028163694 4952223.31516671,-429131.071033529 4951768.00415574,-424622.07505895 4952843.13503987,-423688.327170174 4953499.20752423,-424086.294349759 4954968.38274191,-423068.388925945 4954378.63345336,-423387.653225542 4953355.67417084,-420594.869840519 4953781.00230592,-416026.095299382 4951484.06849063,-412483.018546414 4951024.5410983,-410490.399661215 4954502.24032205,-408186.197521284 4956398.91417441,-407627.262358013 4959300.94633864,-406948.770061627 4959874.85407739,-404949.583326472 4959047.74518163,-402570.908447199 4953743.46829807,-400971.358683991 4952193.11680804,-403533.488084088 4949649.89857885,-406335.177028373 4950193.19571096,-407790.456731515 4952391.46015616,-412060.672398345 4950381.2389307,-410716.93482498 4949156.7509561,-408464.162289794 4943912.8940387,-409350.599394983 4942819.84896006,-408087.791091424 4942451.6711778,-407274.045613725 4940572.4807777,-404446.196589102 4939976.71501489,-402422.964843936 4940450.3670813,-401010.654464241 4939054.8061663,-397647.247369412 4940679.80737878,-395658.413346901 4940528.84765185,-395536.852462953 4938829.79565997,-394268.923462818 4938003.7277717,-393388.720249116 4934757.80596815,-392393.301362444 4934326.71675815,-392573.527618037 4932323.40974412,-393464.640141837 4931903.10653605,-393085.597275686 4931094.7353605,-398426.261165985 4929156.87541607,-398261.174361137 4926238.00816416,-394045.059966834 4925765.18668498,-392982.960705174 4926391.81893628,-393090.272694301 4927176.84692181,-391648.240010564 4924626.06386961,-391889.914625075 4923086.14787613,-394345.177314013 4923235.086036,-395550.878718795 4917812.79243978,-399009.463978251 4912927.7157945,-398948.794855767 4911941.91010796,-398092.636652078 4911806.57392519,-401991.601817112 4911722.9204501,-406225.972607907 4914505.47286319,-411104.994569885 4912569.26941163,-412925.513522316 4913030.3608866,-414630.148884835 4914436.69169949,-414207.691417276 4919205.78028405,-418306.141109809 4917994.9580478,-424184.700779621 4918938.12432889,-426816.961458921 4923664.37379373,-420956.324227126 4923381.98014807,-420186.661267781 4924286.48693378,-420943.411166194 4926812.76394433,-419779.45457046 4928527.43466337,-419768.767899344 4930681.94459216,-421911.668097113 4930432.40620397,-423482.386112205 4933451.28047252,-427272.814773717 4934151.56473242,-427144.908678797 4939731.77191996,-428982.125554848 4940522.84445172,-428986.133056516 4942437.17281266,-431237.792396792 4947309.68284815,-432476.889648814 4947791.74800037,-432540.453078056 4949775.20452642))', 3857) as g +), +b as ( + select ST_Transform(g, 4326) as g from a +) +SELECT st_astext(CDB_PIA(g)) from b; +``` diff --git a/doc/14_densify.md b/doc/14_densify.md new file mode 100644 index 0000000..2cec7e6 --- /dev/null +++ b/doc/14_densify.md @@ -0,0 +1,35 @@ +## Densify function + +Iterative densification of a set of scattered points using Delaunay triangulation. The new points are located at the centroids of the grid cells and have as assigned value the barycentric average value of the cell's vertex. + +### CDB_Densify(geomin geometry[], colin numeric[], iterations integer) + +#### Arguments + +| Name | Type | Description | +|------|------|-------------| +| geomin | geometry[] | Array of points geometries | +| colin | numeric[] | Array of points' values | +| iterations | integer | Number of iterations | + +### Returns + +Returns a table object + +| Name | Type | Description | +|------|------|-------------| +| geomout | geometry | Geometries of new dataset of points| +| colout | numeric | Values of points| + +#### Example Usage + +```sql +with data as ( + select + ARRAY[7.0,8.0,1.0,2.0,3.0,5.0,6.0,4.0] as colin, + ARRAY[ST_GeomFromText('POINT(2.1744 41.4036)'),ST_GeomFromText('POINT(2.1228 41.3809)'),ST_GeomFromText('POINT(2.1511 41.3742)'),ST_GeomFromText('POINT(2.1528 41.4136)'),ST_GeomFromText('POINT(2.165 41.3917)'),ST_GeomFromText('POINT(2.1498 41.3713)'),ST_GeomFromText('POINT(2.1533 41.3683)'),ST_GeomFromText('POINT(2.131386 41.413998)')] as geomin +) +select CDB_Densify(geomin, colin, 2) from data; +``` + + diff --git a/doc/15_tinmap.md b/doc/15_tinmap.md new file mode 100644 index 0000000..240acbe --- /dev/null +++ b/doc/15_tinmap.md @@ -0,0 +1,36 @@ +## TINMAP function + +Generates a fake contour map, in the form of a TIN map, from a set of scattered points.Depends on **CDB_Densify**. + +Its iterative nature lets the user smooth the final result as much as desired, but with a exponential time cost increase. + +### CDB_TINmap(geomin geometry[], colin numeric[], iterations integer) + +#### Arguments + +| Name | Type | Description | +|------|------|-------------| +| geomin | geometry[] | Array of points geometries | +| colin | numeric[] | Array of points' values | +| iterations | integer | Number of iterations | + +### Returns + +Returns a table object + +| Name | Type | Description | +|------|------|-------------| +| geomout | geometry | Geometries of new dataset of polygons| +| colout | numeric | Values of each cell| + +#### Example Usage + +```sql +with data as ( + select + ARRAY[7.0,8.0,1.0,2.0,3.0,5.0,6.0,4.0] as colin, + ARRAY[ST_GeomFromText('POINT(2.1744 41.4036)'),ST_GeomFromText('POINT(2.1228 41.3809)'),ST_GeomFromText('POINT(2.1511 41.3742)'),ST_GeomFromText('POINT(2.1528 41.4136)'),ST_GeomFromText('POINT(2.165 41.3917)'),ST_GeomFromText('POINT(2.1498 41.3713)'),ST_GeomFromText('POINT(2.1533 41.3683)'),ST_GeomFromText('POINT(2.131386 41.413998)')] as geomin +) +select CDB_TINmap(geomin, colin, 2) from data; +``` + diff --git a/doc/19_contour.md b/doc/19_contour.md index 1463918..b29ed89 100644 --- a/doc/19_contour.md +++ b/doc/19_contour.md @@ -1,6 +1,6 @@ ## Contour maps -Function to generate a contour map from an scatter dataset of points, using one of three methos: +Function to generate a contour map from an scatter dataset of points, using one of these three methods: * [Nearest neighbor](https://en.wikipedia.org/wiki/Nearest-neighbor_interpolation) * [Barycentric](https://en.wikipedia.org/wiki/Barycentric_coordinate_system) diff --git a/release/crankshaft--0.3.1--0.4.0.sql b/release/crankshaft--0.3.1--0.4.0.sql new file mode 100644 index 0000000..0619987 --- /dev/null +++ b/release/crankshaft--0.3.1--0.4.0.sql @@ -0,0 +1,1948 @@ +--DO NOT MODIFY THIS FILE, IT IS GENERATED AUTOMATICALLY FROM SOURCES +-- Complain if script is sourced in psql, rather than via CREATE EXTENSION +\echo Use "CREATE EXTENSION crankshaft" to load this file. \quit +-- Version number of the extension release +CREATE OR REPLACE FUNCTION cdb_crankshaft_version() +RETURNS text AS $$ + SELECT '0.4.0'::text; +$$ language 'sql' STABLE STRICT; + +-- Internal identifier of the installed extension instence +-- e.g. 'dev' for current development version +CREATE OR REPLACE FUNCTION _cdb_crankshaft_internal_version() +RETURNS text AS $$ + SELECT installed_version FROM pg_available_extensions where name='crankshaft' and pg_available_extensions IS NOT NULL; +$$ language 'sql' STABLE STRICT; +-- Internal function. +-- Set the seeds of the RNGs (Random Number Generators) +-- used internally. +CREATE OR REPLACE FUNCTION +_cdb_random_seeds (seed_value INTEGER) RETURNS VOID +AS $$ + from crankshaft import random_seeds + random_seeds.set_random_seeds(seed_value) +$$ LANGUAGE plpythonu; +CREATE OR REPLACE FUNCTION + CDB_PyAggS(current_state Numeric[], current_row Numeric[]) + returns NUMERIC[] as $$ + BEGIN + if array_upper(current_state,1) is null then + RAISE NOTICE 'setting state %',array_upper(current_row,1); + current_state[1] = array_upper(current_row,1); + end if; + return array_cat(current_state,current_row) ; + END + $$ LANGUAGE plpgsql; + +-- Create aggregate if it did not exist +DO $$ +BEGIN + IF NOT EXISTS ( + SELECT * + FROM pg_catalog.pg_proc p + LEFT JOIN pg_catalog.pg_namespace n ON n.oid = p.pronamespace + WHERE n.nspname = 'cdb_crankshaft' + AND p.proname = 'cdb_pyagg' + AND p.proisagg) + THEN + CREATE AGGREGATE CDB_PyAgg(NUMERIC[]) ( + SFUNC = CDB_PyAggS, + STYPE = Numeric[], + INITCOND = "{}" + ); + END IF; +END +$$ LANGUAGE plpgsql; + +CREATE OR REPLACE FUNCTION + CDB_CreateAndPredictSegment( + target NUMERIC[], + features NUMERIC[], + target_features NUMERIC[], + target_ids NUMERIC[], + n_estimators INTEGER DEFAULT 1200, + max_depth INTEGER DEFAULT 3, + subsample DOUBLE PRECISION DEFAULT 0.5, + learning_rate DOUBLE PRECISION DEFAULT 0.01, + min_samples_leaf INTEGER DEFAULT 1) +RETURNS TABLE(cartodb_id NUMERIC, prediction NUMERIC, accuracy NUMERIC) +AS $$ + import numpy as np + import plpy + + from crankshaft.segmentation import create_and_predict_segment_agg + model_params = {'n_estimators': n_estimators, + 'max_depth': max_depth, + 'subsample': subsample, + 'learning_rate': learning_rate, + 'min_samples_leaf': min_samples_leaf} + + def unpack2D(data): + dimension = data.pop(0) + a = np.array(data, dtype=float) + return a.reshape(len(a)/dimension, dimension) + + return create_and_predict_segment_agg(np.array(target, dtype=float), + unpack2D(features), + unpack2D(target_features), + target_ids, + model_params) + +$$ LANGUAGE plpythonu; + +CREATE OR REPLACE FUNCTION + CDB_CreateAndPredictSegment ( + query TEXT, + variable_name TEXT, + target_table TEXT, + n_estimators INTEGER DEFAULT 1200, + max_depth INTEGER DEFAULT 3, + subsample DOUBLE PRECISION DEFAULT 0.5, + learning_rate DOUBLE PRECISION DEFAULT 0.01, + min_samples_leaf INTEGER DEFAULT 1) +RETURNS TABLE (cartodb_id TEXT, prediction NUMERIC, accuracy NUMERIC) +AS $$ + from crankshaft.segmentation import create_and_predict_segment + model_params = {'n_estimators': n_estimators, 'max_depth':max_depth, 'subsample' : subsample, 'learning_rate': learning_rate, 'min_samples_leaf' : min_samples_leaf} + return create_and_predict_segment(query,variable_name,target_table, model_params) +$$ LANGUAGE plpythonu; +CREATE OR REPLACE FUNCTION CDB_Gravity( + IN target_query text, + IN weight_column text, + IN source_query text, + IN pop_column text, + IN target bigint, + IN radius integer, + IN minval numeric DEFAULT -10e307 + ) +RETURNS TABLE( + the_geom geometry, + source_id bigint, + target_id bigint, + dist numeric, + h numeric, + hpop numeric) AS $$ +DECLARE + t_id bigint[]; + t_geom geometry[]; + t_weight numeric[]; + s_id bigint[]; + s_geom geometry[]; + s_pop numeric[]; +BEGIN + EXECUTE 'WITH foo as('+target_query+') SELECT array_agg(cartodb_id), array_agg(the_geom), array_agg(' || weight_column || ') FROM foo' INTO t_id, t_geom, t_weight; + EXECUTE 'WITH foo as('+source_query+') SELECT array_agg(cartodb_id), array_agg(the_geom), array_agg(' || pop_column || ') FROM foo' INTO s_id, s_geom, s_pop; + RETURN QUERY + SELECT g.* FROM t, s, CDB_Gravity(t_id, t_geom, t_weight, s_id, s_geom, s_pop, target, radius, minval) g; +END; +$$ language plpgsql; + +CREATE OR REPLACE FUNCTION CDB_Gravity( + IN t_id bigint[], + IN t_geom geometry[], + IN t_weight numeric[], + IN s_id bigint[], + IN s_geom geometry[], + IN s_pop numeric[], + IN target bigint, + IN radius integer, + IN minval numeric DEFAULT -10e307 + ) +RETURNS TABLE( + the_geom geometry, + source_id bigint, + target_id bigint, + dist numeric, + h numeric, + hpop numeric) AS $$ +DECLARE + t_type text; + s_type text; + t_center geometry[]; + s_center geometry[]; +BEGIN + t_type := GeometryType(t_geom[1]); + s_type := GeometryType(s_geom[1]); + IF t_type = 'POINT' THEN + t_center := t_geom; + ELSE + WITH tmp as (SELECT unnest(t_geom) as g) SELECT array_agg(ST_Centroid(g)) INTO t_center FROM tmp; + END IF; + IF s_type = 'POINT' THEN + s_center := s_geom; + ELSE + WITH tmp as (SELECT unnest(s_geom) as g) SELECT array_agg(ST_Centroid(g)) INTO s_center FROM tmp; + END IF; + RETURN QUERY + with target0 as( + SELECT unnest(t_center) as tc, unnest(t_weight) as tw, unnest(t_id) as td + ), + source0 as( + SELECT unnest(s_center) as sc, unnest(s_id) as sd, unnest (s_geom) as sg, unnest(s_pop) as sp + ), + prev0 as( + SELECT + source0.sg, + source0.sd as sourc_id, + coalesce(source0.sp,0) as sp, + target.td as targ_id, + coalesce(target.tw,0) as tw, + GREATEST(1.0,ST_Distance(geography(target.tc), geography(source0.sc)))::numeric as distance + FROM source0 + CROSS JOIN LATERAL + ( + SELECT + * + FROM target0 + WHERE tw > minval + AND ST_DWithin(geography(source0.sc), geography(tc), radius) + ) AS target + ), + deno as( + SELECT + sourc_id, + sum(tw/distance) as h_deno + FROM + prev0 + GROUP BY sourc_id + ) + SELECT + p.sg as the_geom, + p.sourc_id as source_id, + p.targ_id as target_id, + case when p.distance > 1 then p.distance else 0.0 end as dist, + 100*(p.tw/p.distance)/d.h_deno as h, + p.sp*(p.tw/p.distance)/d.h_deno as hpop + FROM + prev0 p, + deno d + WHERE + p.targ_id = target AND + p.sourc_id = d.sourc_id; +END; +$$ language plpgsql; +-- 0: nearest neighbor +-- 1: barymetric +-- 2: IDW + +CREATE OR REPLACE FUNCTION CDB_SpatialInterpolation( + IN query text, + IN point geometry, + IN method integer DEFAULT 1, + IN p1 numeric DEFAULT 0, + IN p2 numeric DEFAULT 0 + ) +RETURNS numeric AS +$$ +DECLARE + gs geometry[]; + vs numeric[]; + output numeric; +BEGIN + EXECUTE 'WITH a AS('||query||') SELECT array_agg(the_geom), array_agg(attrib) FROM a' INTO gs, vs; + SELECT CDB_SpatialInterpolation(gs, vs, point, method, p1,p2) INTO output FROM a; + + RETURN output; +END; +$$ +language plpgsql IMMUTABLE; + +CREATE OR REPLACE FUNCTION CDB_SpatialInterpolation( + IN geomin geometry[], + IN colin numeric[], + IN point geometry, + IN method integer DEFAULT 1, + IN p1 numeric DEFAULT 0, + IN p2 numeric DEFAULT 0 + ) +RETURNS numeric AS +$$ +DECLARE + gs geometry[]; + vs numeric[]; + gs2 geometry[]; + vs2 numeric[]; + g geometry; + vertex geometry[]; + sg numeric; + sa numeric; + sb numeric; + sc numeric; + va numeric; + vb numeric; + vc numeric; + output numeric; +BEGIN + output := -999.999; + -- nearest + IF method = 0 THEN + + WITH a as (SELECT unnest(geomin) as g, unnest(colin) as v) + SELECT a.v INTO output FROM a ORDER BY point<->a.g LIMIT 1; + RETURN output; + + -- barymetric + ELSIF method = 1 THEN + WITH a as (SELECT unnest(geomin) AS e), + b as (SELECT ST_DelaunayTriangles(ST_Collect(a.e),0.001, 0) AS t FROM a), + c as (SELECT (ST_Dump(t)).geom as v FROM b), + d as (SELECT v FROM c WHERE ST_Within(point, v)) + SELECT v INTO g FROM d; + IF g is null THEN + -- out of the realm of the input data + RETURN -888.888; + END IF; + -- vertex of the selected cell + WITH a AS (SELECT (ST_DumpPoints(g)).geom AS v) + SELECT array_agg(v) INTO vertex FROM a; + + -- retrieve the value of each vertex + WITH a AS(SELECT unnest(geomin) as geo, unnest(colin) as c) + SELECT c INTO va FROM a WHERE ST_Equals(geo, vertex[1]); + WITH a AS(SELECT unnest(geomin) as geo, unnest(colin) as c) + SELECT c INTO vb FROM a WHERE ST_Equals(geo, vertex[2]); + WITH a AS(SELECT unnest(geomin) as geo, unnest(colin) as c) + SELECT c INTO vc FROM a WHERE ST_Equals(geo, vertex[3]); + + SELECT ST_area(g), ST_area(ST_MakePolygon(ST_MakeLine(ARRAY[point, vertex[2], vertex[3], point]))), ST_area(ST_MakePolygon(ST_MakeLine(ARRAY[point, vertex[1], vertex[3], point]))), ST_area(ST_MakePolygon(ST_MakeLine(ARRAY[point,vertex[1],vertex[2], point]))) INTO sg, sa, sb, sc; + + output := (coalesce(sa,0) * coalesce(va,0) + coalesce(sb,0) * coalesce(vb,0) + coalesce(sc,0) * coalesce(vc,0)) / coalesce(sg); + RETURN output; + + -- IDW + -- p1: limit the number of neighbors, 0->no limit + -- p2: order of distance decay, 0-> order 1 + ELSIF method = 2 THEN + + IF p2 = 0 THEN + p2 := 1; + END IF; + + WITH a as (SELECT unnest(geomin) as g, unnest(colin) as v), + b as (SELECT a.g, a.v FROM a ORDER BY point<->a.g) + SELECT array_agg(b.g), array_agg(b.v) INTO gs, vs FROM b; + IF p1::integer>0 THEN + gs2:=gs; + vs2:=vs; + FOR i IN 1..p1 + LOOP + gs2 := gs2 || gs[i]; + vs2 := vs2 || vs[i]; + END LOOP; + ELSE + gs2:=gs; + vs2:=vs; + END IF; + + WITH a as (SELECT unnest(gs2) as g, unnest(vs2) as v), + b as ( + SELECT + (1/ST_distance(point, a.g)^p2::integer) as k, + (a.v/ST_distance(point, a.g)^p2::integer) as f + FROM a + ) + SELECT sum(b.f)/sum(b.k) INTO output FROM b; + RETURN output; + + END IF; + + RETURN -777.777; + +END; +$$ +language plpgsql IMMUTABLE; +-- ============================================================================================= +-- +-- CDB_Voronoi +-- +-- ============================================================================================= +CREATE OR REPLACE FUNCTION CDB_voronoi( + IN geomin geometry[], + IN buffer numeric DEFAULT 0.5, + IN tolerance numeric DEFAULT 1e-9 + ) +RETURNS geometry AS $$ +DECLARE + geomout geometry; +BEGIN + -- we need to make the geometry calculations in (pseudo)meters!!! + with a as ( + SELECT unnest(geomin) as g1 + ), + b as( + SELECT st_transform(g1, 3857) g2 from a + ) + SELECT array_agg(g2) INTO geomin from b; + + WITH + convexhull_1 as ( + SELECT + ST_ConvexHull(ST_Collect(geomin)) as g, + buffer * |/ (st_area(ST_ConvexHull(ST_Collect(geomin)))/PI()) as r + ), + clipper as( + SELECT + st_buffer(ST_MinimumBoundingCircle(a.g), buffer*a.r) as g + FROM convexhull_1 a + ), + env0 as ( + SELECT + (st_dumppoints(st_expand(a.g, buffer*a.r))).geom as e + FROM convexhull_1 a + ), + env as ( + SELECT + array_agg(env0.e) as e + FROM env0 + ), + sample AS ( + SELECT + ST_Collect(geomin || env.e) as geom + FROM env + ), + convexhull as ( + SELECT + ST_ConvexHull(ST_Collect(geomin)) as cg + ), + tin as ( + SELECT + ST_Dump(ST_DelaunayTriangles(geom, tolerance, 0)) as gd + FROM + sample + ), + tin_polygons as ( + SELECT + (gd).Path as id, + (gd).Geom as pg, + ST_Centroid(ST_MinimumBoundingCircle((gd).Geom, 180)) as ct + FROM tin + ), + tin_lines as ( + SELECT + id, + ST_ExteriorRing(pg) as lg + FROM tin_polygons + ), + tin_nodes as ( + SELECT + id, + ST_PointN(lg,1) p1, + ST_PointN(lg,2) p2, + ST_PointN(lg,3) p3 + FROM tin_lines + ), + tin_edges AS ( + SELECT + p.id, + UNNEST(ARRAY[ + ST_MakeLine(n.p1,n.p2) , + ST_MakeLine(n.p2,n.p3) , + ST_MakeLine(n.p3,n.p1)]) as Edge, + ST_Force2D(cdb_crankshaft._Find_Circle(n.p1,n.p2,n.p3)) as ct, + CASE WHEN st_distance(p.ct, ST_ExteriorRing(p.pg)) < tolerance THEN + TRUE + ELSE FALSE END AS ctx, + p.pg, + ST_within(p.ct, convexhull.cg) as ctin + FROM + tin_polygons p, + tin_nodes n, + convexhull + WHERE p.id = n.id + ), + voro_nodes as ( + SELECT + CASE WHEN x.ctx = TRUE THEN + ST_Centroid(x.edge) + ELSE + x.ct + END as xct, + CASE WHEN y.id is null THEN + CASE WHEN x.ctin = TRUE THEN + ST_SetSRID(ST_MakePoint( + ST_X(x.ct) + ((ST_X(ST_Centroid(x.edge)) - ST_X(x.ct)) * (1+buffer)), + ST_Y(x.ct) + ((ST_Y(ST_Centroid(x.edge)) - ST_Y(x.ct)) * (1+buffer)) + ), ST_SRID(x.ct)) + END + ELSE + y.ct + END as yct + FROM + tin_edges x + LEFT OUTER JOIN + tin_edges y + ON x.id <> y.id AND ST_Equals(x.edge, y.edge) + ), + voro_edges as( + SELECT + ST_LineMerge(ST_Collect(ST_MakeLine(xct, yct))) as v + FROM + voro_nodes + ), + voro_cells as( + SELECT + ST_Polygonize( + ST_Node( + ST_LineMerge( + ST_Union(v, ST_ExteriorRing( + ST_Convexhull(v) + ) + ) + ) + ) + ) as g + FROM + voro_edges + ), + voro_set as( + SELECT + (st_dump(v.g)).geom as g + FROM voro_cells v + ), + clipped_voro as( + SELECT + ST_intersection(c.g, v.g) as g + FROM + voro_set v, + clipper c + WHERE + ST_GeometryType(v.g) = 'ST_Polygon' + ) + SELECT + st_collect( + ST_Transform( + ST_ConvexHull(g), + 4326 + ) + ) + INTO geomout + FROM + clipped_voro; + RETURN geomout; +END; +$$ language plpgsql IMMUTABLE; + +/** ---------------------------------------------------------------------------------------- + * @function : FindCircle + * @precis : Function that determines if three points form a circle. If so a table containing + * centre and radius is returned. If not, a null table is returned. + * @version : 1.0.1 + * @param : p_pt1 : First point in curve + * @param : p_pt2 : Second point in curve + * @param : p_pt3 : Third point in curve + * @return : geometry : In which X,Y ordinates are the centre X, Y and the Z being the radius of found circle + * or NULL if three points do not form a circle. + * @history : Simon Greener - Feb 2012 - Original coding. + * Rafa de la Torre - Aug 2016 - Small fix for type checking + * @copyright : Simon Greener @ 2012 + * Licensed under a Creative Commons Attribution-Share Alike 2.5 Australia License. (http://creativecommons.org/licenses/by-sa/2.5/au/) +**/ +CREATE OR REPLACE FUNCTION _Find_Circle( + IN p_pt1 geometry, + IN p_pt2 geometry, + IN p_pt3 geometry) + RETURNS geometry AS +$BODY$ +DECLARE + v_Centre geometry; + v_radius NUMERIC; + v_CX NUMERIC; + v_CY NUMERIC; + v_dA NUMERIC; + v_dB NUMERIC; + v_dC NUMERIC; + v_dD NUMERIC; + v_dE NUMERIC; + v_dF NUMERIC; + v_dG NUMERIC; +BEGIN + IF ( p_pt1 IS NULL OR p_pt2 IS NULL OR p_pt3 IS NULL ) THEN + RAISE EXCEPTION 'All supplied points must be not null.'; + RETURN NULL; + END IF; + IF ( ST_GeometryType(p_pt1) <> 'ST_Point' OR + ST_GeometryType(p_pt2) <> 'ST_Point' OR + ST_GeometryType(p_pt3) <> 'ST_Point' ) THEN + RAISE EXCEPTION 'All supplied geometries must be points.'; + RETURN NULL; + END IF; + v_dA := ST_X(p_pt2) - ST_X(p_pt1); + v_dB := ST_Y(p_pt2) - ST_Y(p_pt1); + v_dC := ST_X(p_pt3) - ST_X(p_pt1); + v_dD := ST_Y(p_pt3) - ST_Y(p_pt1); + v_dE := v_dA * (ST_X(p_pt1) + ST_X(p_pt2)) + v_dB * (ST_Y(p_pt1) + ST_Y(p_pt2)); + v_dF := v_dC * (ST_X(p_pt1) + ST_X(p_pt3)) + v_dD * (ST_Y(p_pt1) + ST_Y(p_pt3)); + v_dG := 2.0 * (v_dA * (ST_Y(p_pt3) - ST_Y(p_pt2)) - v_dB * (ST_X(p_pt3) - ST_X(p_pt2))); + -- If v_dG is zero then the three points are collinear and no finite-radius + -- circle through them exists. + IF ( v_dG = 0 ) THEN + RETURN NULL; + ELSE + v_CX := (v_dD * v_dE - v_dB * v_dF) / v_dG; + v_CY := (v_dA * v_dF - v_dC * v_dE) / v_dG; + v_Radius := SQRT(POWER(ST_X(p_pt1) - v_CX,2) + POWER(ST_Y(p_pt1) - v_CY,2) ); + END IF; + RETURN ST_SetSRID(ST_MakePoint(v_CX, v_CY, v_radius),ST_Srid(p_pt1)); +END; +$BODY$ + LANGUAGE plpgsql VOLATILE STRICT; + +-- Moran's I Global Measure (public-facing) +CREATE OR REPLACE FUNCTION + CDB_AreasOfInterestGlobal( + subquery TEXT, + column_name TEXT, + w_type TEXT DEFAULT 'knn', + num_ngbrs INT DEFAULT 5, + permutations INT DEFAULT 99, + geom_col TEXT DEFAULT 'the_geom', + id_col TEXT DEFAULT 'cartodb_id') +RETURNS TABLE (moran NUMERIC, significance NUMERIC) +AS $$ + from crankshaft.clustering import moran_local + # TODO: use named parameters or a dictionary + return moran(subquery, column_name, w_type, num_ngbrs, permutations, geom_col, id_col) +$$ LANGUAGE plpythonu; + +-- Moran's I Local (internal function) +CREATE OR REPLACE FUNCTION + _CDB_AreasOfInterestLocal( + subquery TEXT, + column_name TEXT, + w_type TEXT, + num_ngbrs INT, + permutations INT, + geom_col TEXT, + id_col TEXT) +RETURNS TABLE (moran NUMERIC, quads TEXT, significance NUMERIC, rowid INT, vals NUMERIC) +AS $$ + from crankshaft.clustering import moran_local + # TODO: use named parameters or a dictionary + return moran_local(subquery, column_name, w_type, num_ngbrs, permutations, geom_col, id_col) +$$ LANGUAGE plpythonu; + +-- Moran's I Local (public-facing function) +CREATE OR REPLACE FUNCTION + CDB_AreasOfInterestLocal( + subquery TEXT, + column_name TEXT, + w_type TEXT DEFAULT 'knn', + num_ngbrs INT DEFAULT 5, + permutations INT DEFAULT 99, + geom_col TEXT DEFAULT 'the_geom', + id_col TEXT DEFAULT 'cartodb_id') +RETURNS TABLE (moran NUMERIC, quads TEXT, significance NUMERIC, rowid INT, vals NUMERIC) +AS $$ + + SELECT moran, quads, significance, rowid, vals + FROM cdb_crankshaft._CDB_AreasOfInterestLocal(subquery, column_name, w_type, num_ngbrs, permutations, geom_col, id_col); + +$$ LANGUAGE SQL; + +-- Moran's I only for HH and HL (public-facing function) +CREATE OR REPLACE FUNCTION + CDB_GetSpatialHotspots( + subquery TEXT, + column_name TEXT, + w_type TEXT DEFAULT 'knn', + num_ngbrs INT DEFAULT 5, + permutations INT DEFAULT 99, + geom_col TEXT DEFAULT 'the_geom', + id_col TEXT DEFAULT 'cartodb_id') + RETURNS TABLE (moran NUMERIC, quads TEXT, significance NUMERIC, rowid INT, vals NUMERIC) +AS $$ + + SELECT moran, quads, significance, rowid, vals + FROM cdb_crankshaft._CDB_AreasOfInterestLocal(subquery, column_name, w_type, num_ngbrs, permutations, geom_col, id_col) + WHERE quads IN ('HH', 'HL'); + +$$ LANGUAGE SQL; + +-- Moran's I only for LL and LH (public-facing function) +CREATE OR REPLACE FUNCTION + CDB_GetSpatialColdspots( + subquery TEXT, + attr TEXT, + w_type TEXT DEFAULT 'knn', + num_ngbrs INT DEFAULT 5, + permutations INT DEFAULT 99, + geom_col TEXT DEFAULT 'the_geom', + id_col TEXT DEFAULT 'cartodb_id') + RETURNS TABLE (moran NUMERIC, quads TEXT, significance NUMERIC, rowid INT, vals NUMERIC) +AS $$ + + SELECT moran, quads, significance, rowid, vals + FROM cdb_crankshaft._CDB_AreasOfInterestLocal(subquery, attr, w_type, num_ngbrs, permutations, geom_col, id_col) + WHERE quads IN ('LL', 'LH'); + +$$ LANGUAGE SQL; + +-- Moran's I only for LH and HL (public-facing function) +CREATE OR REPLACE FUNCTION + CDB_GetSpatialOutliers( + subquery TEXT, + attr TEXT, + w_type TEXT DEFAULT 'knn', + num_ngbrs INT DEFAULT 5, + permutations INT DEFAULT 99, + geom_col TEXT DEFAULT 'the_geom', + id_col TEXT DEFAULT 'cartodb_id') + RETURNS TABLE (moran NUMERIC, quads TEXT, significance NUMERIC, rowid INT, vals NUMERIC) +AS $$ + + SELECT moran, quads, significance, rowid, vals + FROM cdb_crankshaft._CDB_AreasOfInterestLocal(subquery, attr, w_type, num_ngbrs, permutations, geom_col, id_col) + WHERE quads IN ('HL', 'LH'); + +$$ LANGUAGE SQL; + +-- Moran's I Global Rate (public-facing function) +CREATE OR REPLACE FUNCTION + CDB_AreasOfInterestGlobalRate( + subquery TEXT, + numerator TEXT, + denominator TEXT, + w_type TEXT DEFAULT 'knn', + num_ngbrs INT DEFAULT 5, + permutations INT DEFAULT 99, + geom_col TEXT DEFAULT 'the_geom', + id_col TEXT DEFAULT 'cartodb_id') +RETURNS TABLE (moran FLOAT, significance FLOAT) +AS $$ + from crankshaft.clustering import moran_local + # TODO: use named parameters or a dictionary + return moran_rate(subquery, numerator, denominator, w_type, num_ngbrs, permutations, geom_col, id_col) +$$ LANGUAGE plpythonu; + + +-- Moran's I Local Rate (internal function) +CREATE OR REPLACE FUNCTION + _CDB_AreasOfInterestLocalRate( + subquery TEXT, + numerator TEXT, + denominator TEXT, + w_type TEXT, + num_ngbrs INT, + permutations INT, + geom_col TEXT, + id_col TEXT) +RETURNS +TABLE(moran NUMERIC, quads TEXT, significance NUMERIC, rowid INT, vals NUMERIC) +AS $$ + from crankshaft.clustering import moran_local_rate + # TODO: use named parameters or a dictionary + return moran_local_rate(subquery, numerator, denominator, w_type, num_ngbrs, permutations, geom_col, id_col) +$$ LANGUAGE plpythonu; + +-- Moran's I Local Rate (public-facing function) +CREATE OR REPLACE FUNCTION + CDB_AreasOfInterestLocalRate( + subquery TEXT, + numerator TEXT, + denominator TEXT, + w_type TEXT DEFAULT 'knn', + num_ngbrs INT DEFAULT 5, + permutations INT DEFAULT 99, + geom_col TEXT DEFAULT 'the_geom', + id_col TEXT DEFAULT 'cartodb_id') +RETURNS +TABLE(moran NUMERIC, quads TEXT, significance NUMERIC, rowid INT, vals NUMERIC) +AS $$ + + SELECT moran, quads, significance, rowid, vals + FROM cdb_crankshaft._CDB_AreasOfInterestLocalRate(subquery, numerator, denominator, w_type, num_ngbrs, permutations, geom_col, id_col); + +$$ LANGUAGE SQL; + +-- Moran's I Local Rate only for HH and HL (public-facing function) +CREATE OR REPLACE FUNCTION + CDB_GetSpatialHotspotsRate( + subquery TEXT, + numerator TEXT, + denominator TEXT, + w_type TEXT DEFAULT 'knn', + num_ngbrs INT DEFAULT 5, + permutations INT DEFAULT 99, + geom_col TEXT DEFAULT 'the_geom', + id_col TEXT DEFAULT 'cartodb_id') +RETURNS +TABLE(moran NUMERIC, quads TEXT, significance NUMERIC, rowid INT, vals NUMERIC) +AS $$ + + SELECT moran, quads, significance, rowid, vals + FROM cdb_crankshaft._CDB_AreasOfInterestLocalRate(subquery, numerator, denominator, w_type, num_ngbrs, permutations, geom_col, id_col) + WHERE quads IN ('HH', 'HL'); + +$$ LANGUAGE SQL; + +-- Moran's I Local Rate only for LL and LH (public-facing function) +CREATE OR REPLACE FUNCTION + CDB_GetSpatialColdspotsRate( + subquery TEXT, + numerator TEXT, + denominator TEXT, + w_type TEXT DEFAULT 'knn', + num_ngbrs INT DEFAULT 5, + permutations INT DEFAULT 99, + geom_col TEXT DEFAULT 'the_geom', + id_col TEXT DEFAULT 'cartodb_id') +RETURNS +TABLE(moran NUMERIC, quads TEXT, significance NUMERIC, rowid INT, vals NUMERIC) +AS $$ + + SELECT moran, quads, significance, rowid, vals + FROM cdb_crankshaft._CDB_AreasOfInterestLocalRate(subquery, numerator, denominator, w_type, num_ngbrs, permutations, geom_col, id_col) + WHERE quads IN ('LL', 'LH'); + +$$ LANGUAGE SQL; + +-- Moran's I Local Rate only for LH and HL (public-facing function) +CREATE OR REPLACE FUNCTION + CDB_GetSpatialOutliersRate( + subquery TEXT, + numerator TEXT, + denominator TEXT, + w_type TEXT DEFAULT 'knn', + num_ngbrs INT DEFAULT 5, + permutations INT DEFAULT 99, + geom_col TEXT DEFAULT 'the_geom', + id_col TEXT DEFAULT 'cartodb_id') +RETURNS +TABLE(moran NUMERIC, quads TEXT, significance NUMERIC, rowid INT, vals NUMERIC) +AS $$ + + SELECT moran, quads, significance, rowid, vals + FROM cdb_crankshaft._CDB_AreasOfInterestLocalRate(subquery, numerator, denominator, w_type, num_ngbrs, permutations, geom_col, id_col) + WHERE quads IN ('HL', 'LH'); + +$$ LANGUAGE SQL; +CREATE OR REPLACE FUNCTION CDB_KMeans(query text, no_clusters integer,no_init integer default 20) +RETURNS table (cartodb_id integer, cluster_no integer) as $$ + + from crankshaft.clustering import kmeans + return kmeans(query,no_clusters,no_init) + +$$ language plpythonu; + + +CREATE OR REPLACE FUNCTION CDB_WeightedMeanS(state Numeric[],the_geom GEOMETRY(Point, 4326), weight NUMERIC) +RETURNS Numeric[] AS +$$ +DECLARE + newX NUMERIC; + newY NUMERIC; + newW NUMERIC; +BEGIN + IF weight IS NULL OR the_geom IS NULL THEN + newX = state[1]; + newY = state[2]; + newW = state[3]; + ELSE + newX = state[1] + ST_X(the_geom)*weight; + newY = state[2] + ST_Y(the_geom)*weight; + newW = state[3] + weight; + END IF; + RETURN Array[newX,newY,newW]; + +END +$$ LANGUAGE plpgsql; + +CREATE OR REPLACE FUNCTION CDB_WeightedMeanF(state Numeric[]) +RETURNS GEOMETRY AS +$$ +BEGIN + IF state[3] = 0 THEN + RETURN ST_SetSRID(ST_MakePoint(state[1],state[2]), 4326); + ELSE + RETURN ST_SETSRID(ST_MakePoint(state[1]/state[3], state[2]/state[3]),4326); + END IF; +END +$$ LANGUAGE plpgsql; + +-- Create aggregate if it did not exist +DO $$ +BEGIN + IF NOT EXISTS ( + SELECT * + FROM pg_catalog.pg_proc p + LEFT JOIN pg_catalog.pg_namespace n ON n.oid = p.pronamespace + WHERE n.nspname = 'cdb_crankshaft' + AND p.proname = 'cdb_weightedmean' + AND p.proisagg) + THEN + CREATE AGGREGATE CDB_WeightedMean(geometry(Point, 4326), NUMERIC) ( + SFUNC = CDB_WeightedMeanS, + FINALFUNC = CDB_WeightedMeanF, + STYPE = Numeric[], + INITCOND = "{0.0,0.0,0.0}" + ); + END IF; +END +$$ LANGUAGE plpgsql; +-- Spatial Markov + +-- input table format: +-- id | geom | date_1 | date_2 | date_3 +-- 1 | Pt1 | 12.3 | 13.1 | 14.2 +-- 2 | Pt2 | 11.0 | 13.2 | 12.5 +-- ... +-- Sample Function call: +-- SELECT CDB_SpatialMarkov('SELECT * FROM real_estate', +-- Array['date_1', 'date_2', 'date_3']) + +CREATE OR REPLACE FUNCTION + CDB_SpatialMarkovTrend ( + subquery TEXT, + time_cols TEXT[], + num_classes INT DEFAULT 7, + w_type TEXT DEFAULT 'knn', + num_ngbrs INT DEFAULT 5, + permutations INT DEFAULT 99, + geom_col TEXT DEFAULT 'the_geom', + id_col TEXT DEFAULT 'cartodb_id') +RETURNS TABLE (trend NUMERIC, trend_up NUMERIC, trend_down NUMERIC, volatility NUMERIC, rowid INT) +AS $$ + + from crankshaft.space_time_dynamics import spatial_markov_trend + + ## TODO: use named parameters or a dictionary + return spatial_markov_trend(subquery, time_cols, num_classes, w_type, num_ngbrs, permutations, geom_col, id_col) +$$ LANGUAGE plpythonu; + +-- input table format: identical to above but in a predictable format +-- Sample function call: +-- SELECT cdb_spatial_markov('SELECT * FROM real_estate', +-- 'date_1') + + +-- CREATE OR REPLACE FUNCTION +-- cdb_spatial_markov ( +-- subquery TEXT, +-- time_col_min text, +-- time_col_max text, +-- date_format text, -- '_YYYY_MM_DD' +-- num_time_per_bin INT DEFAULT 1, +-- permutations INT DEFAULT 99, +-- geom_column TEXT DEFAULT 'the_geom', +-- id_col TEXT DEFAULT 'cartodb_id', +-- w_type TEXT DEFAULT 'knn', +-- num_ngbrs int DEFAULT 5) +-- RETURNS TABLE (moran FLOAT, quads TEXT, significance FLOAT, ids INT) +-- AS $$ +-- plpy.execute('SELECT cdb_crankshaft._cdb_crankshaft_activate_py()') +-- from crankshaft.clustering import moran_local +-- # TODO: use named parameters or a dictionary +-- return spatial_markov(subquery, time_cols, permutations, geom_column, id_col, w_type, num_ngbrs) +-- $$ LANGUAGE plpythonu; +-- +-- -- input table format: +-- -- id | geom | date | measurement +-- -- 1 | Pt1 | 12/3 | 13.2 +-- -- 2 | Pt2 | 11/5 | 11.3 +-- -- 3 | Pt1 | 11/13 | 12.9 +-- -- 4 | Pt3 | 12/19 | 10.1 +-- -- ... +-- +-- CREATE OR REPLACE FUNCTION +-- cdb_spatial_markov ( +-- subquery TEXT, +-- time_col text, +-- num_time_per_bin INT DEFAULT 1, +-- permutations INT DEFAULT 99, +-- geom_column TEXT DEFAULT 'the_geom', +-- id_col TEXT DEFAULT 'cartodb_id', +-- w_type TEXT DEFAULT 'knn', +-- num_ngbrs int DEFAULT 5) +-- RETURNS TABLE (moran FLOAT, quads TEXT, significance FLOAT, ids INT) +-- AS $$ +-- plpy.execute('SELECT cdb_crankshaft._cdb_crankshaft_activate_py()') +-- from crankshaft.clustering import moran_local +-- # TODO: use named parameters or a dictionary +-- return spatial_markov(subquery, time_cols, permutations, geom_column, id_col, w_type, num_ngbrs) +-- $$ LANGUAGE plpythonu; +-- Based on: +-- https://github.com/mapbox/polylabel/blob/master/index.js +-- https://sites.google.com/site/polesofinaccessibility/ +-- Requires: https://github.com/CartoDB/cartodb-postgresql + +-- Based on: +-- https://github.com/mapbox/polylabel/blob/master/index.js +-- https://sites.google.com/site/polesofinaccessibility/ +-- Requires: https://github.com/CartoDB/cartodb-postgresql + +CREATE OR REPLACE FUNCTION CDB_PIA( + IN polygon geometry, + IN tolerance numeric DEFAULT 1.0 + ) +RETURNS geometry AS $$ +DECLARE + env geometry[]; + cells geometry[]; + cell geometry; + best_c geometry; + best_d numeric; + test_d numeric; + test_mx numeric; + test_h numeric; + test_cells geometry[]; + width numeric; + height numeric; + h numeric; + i integer; + n integer; + sqr numeric; + p geometry; +BEGIN + sqr := |/2; + polygon := ST_Transform(polygon, 3857); + + -- grid #0 cell size + height := ST_YMax(polygon) - ST_YMin(polygon); + width := ST_XMax(polygon) - ST_XMin(polygon); + h := 0.5*LEAST(height, width); + + -- grid #0 + with c1 as( + SELECT cdb_crankshaft.CDB_RectangleGrid(polygon, h, h) as c + ) + SELECT array_agg(c) INTO cells FROM c1; + + -- 1st guess: centroid + best_d := cdb_crankshaft._Signed_Dist(polygon, ST_Centroid(Polygon)); + + -- looping the loop + n := array_length(cells,1); + i := 1; + LOOP + + EXIT WHEN i > n; + + cell := cells[i]; + i := i+1; + + -- cell side size, it's square + test_h := ST_XMax(cell) - ST_XMin(cell) ; + + -- check distance + test_d := cdb_crankshaft._Signed_Dist(polygon, ST_Centroid(cell)); + IF test_d > best_d THEN + best_d := test_d; + best_c := cells[i]; + END IF; + + -- longest distance within the cell + test_mx := test_d + (test_h/2 * sqr); + + -- if the cell has no chance to contains the desired point, continue + CONTINUE WHEN test_mx - best_d <= tolerance; + + -- resample the cell + with c1 as( + SELECT cdb_crankshaft.CDB_RectangleGrid(cell, test_h/2, test_h/2) as c + ) + SELECT array_agg(c) INTO test_cells FROM c1; + + -- concat the new cells to the former array + cells := cells || test_cells; + + -- prepare next iteration + n := array_length(cells,1); + + END LOOP; + + RETURN ST_transform(ST_Centroid(best_c), 4326); + +END; +$$ language plpgsql IMMUTABLE; + + +-- signed distance point to polygon with holes +-- negative is the point is out the polygon +CREATE OR REPLACE FUNCTION _Signed_Dist( + IN polygon geometry, + IN point geometry + ) +RETURNS numeric AS $$ +DECLARE + i integer; + within integer; + holes integer; + dist numeric; +BEGIN + dist := 1e999; + SELECT LEAST(dist, ST_distance(point, ST_ExteriorRing(polygon))::numeric) INTO dist; + SELECT CASE WHEN ST_Within(point,polygon) THEN 1 ELSE -1 END INTO within; + SELECT ST_NumInteriorRings(polygon) INTO holes; + IF holes > 0 THEN + FOR i IN 1..holes + LOOP + SELECT LEAST(dist, ST_distance(point, ST_InteriorRingN(polygon, i))::numeric) INTO dist; + END LOOP; + END IF; + dist := dist * within::numeric; + RETURN dist; +END; +$$ language plpgsql IMMUTABLE; +-- +-- Iterative densification of a set of points using Delaunay triangulation +-- the new points have as assigned value the average value of the 3 vertex (centroid) +-- +-- @param geomin - array of geometries (points) +-- +-- @param colin - array of numeric values in that points +-- +-- @param iterations - integer, number of iterations +-- +-- +-- Returns: TABLE(geomout geometry, colout numeric) +-- +-- +CREATE OR REPLACE FUNCTION CDB_Densify( + IN geomin geometry[], + IN colin numeric[], + IN iterations integer + ) +RETURNS TABLE(geomout geometry, colout numeric) AS $$ +DECLARE + geotemp geometry[]; + coltemp numeric[]; + i integer; + gs geometry[]; + g geometry; + vertex geometry[]; + va numeric; + vb numeric; + vc numeric; + center geometry; + centerval numeric; + tmp integer; +BEGIN + geotemp := geomin; + coltemp := colin; + FOR i IN 1..iterations + LOOP + -- generate TIN + WITH a as (SELECT unnest(geotemp) AS e), + b as (SELECT ST_DelaunayTriangles(ST_Collect(a.e),0.001, 0) AS t FROM a), + c as (SELECT (ST_Dump(t)).geom AS v FROM b) + SELECT array_agg(v) INTO gs FROM c; + -- loop cells + FOREACH g IN ARRAY gs + LOOP + -- append centroid + SELECT ST_Centroid(g) INTO center; + geotemp := array_append(geotemp, center); + -- retrieve the value of each vertex + WITH a AS (SELECT (ST_DumpPoints(g)).geom AS v) + SELECT array_agg(v) INTO vertex FROM a; + WITH a AS(SELECT unnest(geotemp) as geo, unnest(coltemp) as c) + SELECT c INTO va FROM a WHERE ST_Equals(geo, vertex[1]); + WITH a AS(SELECT unnest(geotemp) as geo, unnest(coltemp) as c) + SELECT c INTO vb FROM a WHERE ST_Equals(geo, vertex[2]); + WITH a AS(SELECT unnest(geotemp) as geo, unnest(coltemp) as c) + SELECT c INTO vc FROM a WHERE ST_Equals(geo, vertex[3]); + -- calc the value at the center + centerval := (va + vb + vc) / 3; + -- append the value + coltemp := array_append(coltemp, centerval); + END LOOP; + END LOOP; + RETURN QUERY SELECT unnest(geotemp ) as geomout, unnest(coltemp ) as colout; +END; +$$ language plpgsql IMMUTABLE; +CREATE OR REPLACE FUNCTION CDB_TINmap( + IN geomin geometry[], + IN colin numeric[], + IN iterations integer + ) +RETURNS TABLE(geomout geometry, colout numeric) AS $$ +DECLARE + p geometry[]; + vals numeric[]; + gs geometry[]; + g geometry; + vertex geometry[]; + centerval numeric; + va numeric; + vb numeric; + vc numeric; + coltemp numeric[]; +BEGIN + SELECT array_agg(dens.geomout), array_agg(dens.colout) INTO p, vals FROM cdb_crankshaft.CDB_Densify(geomin, colin, iterations) dens; + WITH a as (SELECT unnest(p) AS e), + b as (SELECT ST_DelaunayTriangles(ST_Collect(a.e),0.001, 0) AS t FROM a), + c as (SELECT (ST_Dump(t)).geom AS v FROM b) + SELECT array_agg(v) INTO gs FROM c; + FOREACH g IN ARRAY gs + LOOP + -- retrieve the vertex of each triangle + WITH a AS (SELECT (ST_DumpPoints(g)).geom AS v) + SELECT array_agg(v) INTO vertex FROM a; + -- retrieve the value of each vertex + WITH a AS(SELECT unnest(p) as geo, unnest(vals) as c) + SELECT c INTO va FROM a WHERE ST_Equals(geo, vertex[1]); + WITH a AS(SELECT unnest(p) as geo, unnest(vals) as c) + SELECT c INTO vb FROM a WHERE ST_Equals(geo, vertex[2]); + WITH a AS(SELECT unnest(p) as geo, unnest(vals) as c) + SELECT c INTO vc FROM a WHERE ST_Equals(geo, vertex[3]); + -- calc the value at the center + centerval := (va + vb + vc) / 3; + -- append the value + coltemp := array_append(coltemp, centerval); + END LOOP; + RETURN QUERY SELECT unnest(gs) as geomout, unnest(coltemp ) as colout; +END; +$$ language plpgsql IMMUTABLE; +CREATE OR REPLACE FUNCTION CDB_Contour( + IN geomin geometry[], + IN colin numeric[], + IN buffer numeric, + IN intmethod integer, + IN classmethod integer, + IN steps integer, + IN max_time integer DEFAULT 60000 + ) +RETURNS TABLE( + the_geom geometry, + bin integer, + min_value numeric, + max_value numeric, + avg_value numeric +) AS $$ +DECLARE + cell_count integer; + tin geometry[]; +BEGIN + -- calc the cell size in web mercator units + -- WITH center as ( + -- SELECT ST_centroid(ST_Collect(geomin)) as c + -- ) + -- SELECT + -- round(resolution / cos(ST_y(c) * pi()/180)) + -- INTO cell + -- FROM center; + -- raise notice 'Resol: %', cell; + + -- calc the optimal number of cells for the current dataset + SELECT + CASE intmethod + WHEN 0 THEN round(3.7745903782 * max_time - 9.4399210051 * array_length(geomin,1) - 1350.8778213073) + WHEN 1 THEN round(2.2855592156 * max_time - 87.285217133 * array_length(geomin,1) + 17255.7085601797) + WHEN 2 THEN round(0.9799471999 * max_time - 127.0334085369 * array_length(geomin,1) + 22707.9579721218) + ELSE 10000 + END INTO cell_count; + + -- we don't have iterative barycentric interpolation in CDB_interpolation, + -- and it's a costy function, so let's make a custom one here till + -- we update the code + -- tin := ARRAY[]::geometry[]; + IF intmethod=1 THEN + WITH + a as (SELECT unnest(geomin) AS e), + b as (SELECT ST_DelaunayTriangles(ST_Collect(a.e),0.001, 0) AS t FROM a), + c as (SELECT (ST_Dump(t)).geom as v FROM b) + SELECT array_agg(v) INTO tin FROM c; + END IF; + -- Delaunay stuff performed just ONCE!! + + -- magic + RETURN QUERY + WITH + convexhull as ( + SELECT + ST_ConvexHull(ST_Collect(geomin)) as g, + buffer * |/ st_area(ST_ConvexHull(ST_Collect(geomin)))/PI() as r + ), + envelope as ( + SELECT + st_expand(a.g, a.r) as e + FROM convexhull a + ), + envelope3857 as( + SELECT + ST_Transform(e, 3857) as geom + FROM envelope + ), + resolution as( + SELECT + round(|/ ( + ST_area(geom) / cell_count + )) as cell + FROM envelope3857 + ), + grid as( + SELECT + ST_Transform(cdb_crankshaft.CDB_RectangleGrid(e.geom, r.cell, r.cell), 4326) as geom + FROM envelope3857 e, resolution r + ), + interp as( + SELECT + geom, + CASE + WHEN intmethod=1 THEN cdb_crankshaft._interp_in_tin(geomin, colin, tin, ST_Centroid(geom)) + ELSE cdb_crankshaft.CDB_SpatialInterpolation(geomin, colin, ST_Centroid(geom), intmethod) + END as val + FROM grid + ), + classes as( + SELECT CASE + WHEN classmethod = 0 THEN + cdb_crankshaft.CDB_EqualIntervalBins(array_agg(val), steps) + WHEN classmethod = 1 THEN + cdb_crankshaft.CDB_HeadsTailsBins(array_agg(val), steps) + WHEN classmethod = 2 THEN + cdb_crankshaft.CDB_JenksBins(array_agg(val), steps) + ELSE + cdb_crankshaft.CDB_QuantileBins(array_agg(val), steps) + END as b + FROM interp + where val is not null + ), + classified as( + SELECT + i.*, + width_bucket(i.val, c.b) as bucket + FROM interp i left join classes c + ON 1=1 + ), + classified2 as( + SELECT + geom, + val, + CASE + WHEN bucket = steps THEN bucket - 1 + ELSE bucket + END as b + FROM classified + ), + final as( + SELECT + st_union(geom) as the_geom, + b as bin, + min(val) as min_value, + max(val) as max_value, + avg(val) as avg_value + FROM classified2 + GROUP BY bin + ) + SELECT + * + FROM final + where final.bin is not null + ; +END; +$$ language plpgsql; + + + +-- ===================================================================== +-- Interp in grid, so we can use barycentric with a precalculated tin (NNI) +-- ===================================================================== +CREATE OR REPLACE FUNCTION _interp_in_tin( + IN geomin geometry[], + IN colin numeric[], + IN tin geometry[], + IN point geometry + ) +RETURNS numeric AS +$$ +DECLARE + g geometry; + vertex geometry[]; + sg numeric; + sa numeric; + sb numeric; + sc numeric; + va numeric; + vb numeric; + vc numeric; + output numeric; +BEGIN + -- get the cell the point is within + WITH + a as (SELECT unnest(tin) as v), + b as (SELECT v FROM a WHERE ST_Within(point, v)) + SELECT v INTO g FROM b; + + -- if we're out of the data realm, + -- return null + IF g is null THEN + RETURN null; + END IF; + + -- vertex of the selected cell + WITH a AS ( + SELECT (ST_DumpPoints(g)).geom AS v + ) + SELECT array_agg(v) INTO vertex FROM a; + + -- retrieve the value of each vertex + WITH a AS(SELECT unnest(geomin) as geo, unnest(colin) as c) + SELECT c INTO va FROM a WHERE ST_Equals(geo, vertex[1]); + + WITH a AS(SELECT unnest(geomin) as geo, unnest(colin) as c) + SELECT c INTO vb FROM a WHERE ST_Equals(geo, vertex[2]); + + WITH a AS(SELECT unnest(geomin) as geo, unnest(colin) as c) + SELECT c INTO vc FROM a WHERE ST_Equals(geo, vertex[3]); + + -- calc the areas + SELECT + ST_area(g), + ST_area(ST_MakePolygon(ST_MakeLine(ARRAY[point, vertex[2], vertex[3], point]))), + ST_area(ST_MakePolygon(ST_MakeLine(ARRAY[point, vertex[1], vertex[3], point]))), + ST_area(ST_MakePolygon(ST_MakeLine(ARRAY[point,vertex[1],vertex[2], point]))) INTO sg, sa, sb, sc; + + output := (coalesce(sa,0) * coalesce(va,0) + coalesce(sb,0) * coalesce(vb,0) + coalesce(sc,0) * coalesce(vc,0)) / coalesce(sg,1); + RETURN output; +END; +$$ +language plpgsql; +-- Function by Stuart Lynn for a simple interpolation of a value +-- from a polygon table over an arbitrary polygon +-- (weighted by the area proportion overlapped) +-- Aereal weighting is a very simple form of aereal interpolation. +-- +-- Parameters: +-- * geom a Polygon geometry which defines the area where a value will be +-- estimated as the area-weighted sum of a given table/column +-- * target_table_name table name of the table that provides the values +-- * target_column column name of the column that provides the values +-- * schema_name optional parameter to defina the schema the target table +-- belongs to, which is necessary if its not in the search_path. +-- Note that target_table_name should never include the schema in it. +-- Return value: +-- Aereal-weighted interpolation of the column values over the geometry +CREATE OR REPLACE +FUNCTION cdb_overlap_sum(geom geometry, target_table_name text, target_column text, schema_name text DEFAULT NULL) + RETURNS numeric AS +$$ +DECLARE + result numeric; + qualified_name text; +BEGIN + IF schema_name IS NULL THEN + qualified_name := Format('%I', target_table_name); + ELSE + qualified_name := Format('%I.%s', schema_name, target_table_name); + END IF; + EXECUTE Format(' + SELECT sum(%I*ST_Area(St_Intersection($1, a.the_geom))/ST_Area(a.the_geom)) + FROM %s AS a + WHERE $1 && a.the_geom + ', target_column, qualified_name) + USING geom + INTO result; + RETURN result; +END; +$$ LANGUAGE plpgsql; +-- +-- Creates N points randomly distributed arround the polygon +-- +-- @param g - the geometry to be turned in to points +-- +-- @param no_points - the number of points to generate +-- +-- @params max_iter_per_point - the function generates points in the polygon's bounding box +-- and discards points which don't lie in the polygon. max_iter_per_point specifies how many +-- misses per point the funciton accepts before giving up. +-- +-- Returns: Multipoint with the requested points +CREATE OR REPLACE FUNCTION cdb_dot_density(geom geometry , no_points Integer, max_iter_per_point Integer DEFAULT 1000) +RETURNS GEOMETRY AS $$ +DECLARE + extent GEOMETRY; + test_point Geometry; + width NUMERIC; + height NUMERIC; + x0 NUMERIC; + y0 NUMERIC; + xp NUMERIC; + yp NUMERIC; + no_left INTEGER; + remaining_iterations INTEGER; + points GEOMETRY[]; + bbox_line GEOMETRY; + intersection_line GEOMETRY; +BEGIN + extent := ST_Envelope(geom); + width := ST_XMax(extent) - ST_XMIN(extent); + height := ST_YMax(extent) - ST_YMIN(extent); + x0 := ST_XMin(extent); + y0 := ST_YMin(extent); + no_left := no_points; + + LOOP + if(no_left=0) THEN + EXIT; + END IF; + yp = y0 + height*random(); + bbox_line = ST_MakeLine( + ST_SetSRID(ST_MakePoint(yp, x0),4326), + ST_SetSRID(ST_MakePoint(yp, x0+width),4326) + ); + intersection_line = ST_Intersection(bbox_line,geom); + test_point = ST_LineInterpolatePoint(st_makeline(st_linemerge(intersection_line)),random()); + points := points || test_point; + no_left = no_left - 1 ; + END LOOP; + RETURN ST_Collect(points); +END; +$$ +LANGUAGE plpgsql VOLATILE; +-- Make sure by default there are no permissions for publicuser +-- NOTE: this happens at extension creation time, as part of an implicit transaction. +-- REVOKE ALL PRIVILEGES ON SCHEMA cdb_crankshaft FROM PUBLIC, publicuser CASCADE; + +-- Grant permissions on the schema to publicuser (but just the schema) +GRANT USAGE ON SCHEMA cdb_crankshaft TO publicuser; + +-- Revoke execute permissions on all functions in the schema by default +-- REVOKE EXECUTE ON ALL FUNCTIONS IN SCHEMA cdb_crankshaft FROM PUBLIC, publicuser; +-- +-- Fill given extent with a rectangular coverage +-- +-- @param ext Extent to fill. Only rectangles with center point falling +-- inside the extent (or at the lower or leftmost edge) will +-- be emitted. The returned hexagons will have the same SRID +-- as this extent. +-- +-- @param width With of each rectangle +-- +-- @param height Height of each rectangle +-- +-- @param origin Optional origin to allow for exact tiling. +-- If omitted the origin will be 0,0. +-- The parameter is checked for having the same SRID +-- as the extent. +-- +-- +CREATE OR REPLACE FUNCTION CDB_RectangleGrid(ext GEOMETRY, width FLOAT8, height FLOAT8, origin GEOMETRY DEFAULT NULL) +RETURNS SETOF GEOMETRY +AS $$ +DECLARE + h GEOMETRY; -- rectangle cell + hstep FLOAT8; -- horizontal step + vstep FLOAT8; -- vertical step + hw FLOAT8; -- half width + hh FLOAT8; -- half height + vstart FLOAT8; + hstart FLOAT8; + hend FLOAT8; + vend FLOAT8; + xoff FLOAT8; + yoff FLOAT8; + xgrd FLOAT8; + ygrd FLOAT8; + x FLOAT8; + y FLOAT8; + srid INTEGER; +BEGIN + + srid := ST_SRID(ext); + + xoff := 0; + yoff := 0; + + IF origin IS NOT NULL THEN + IF ST_SRID(origin) != srid THEN + RAISE EXCEPTION 'SRID mismatch between extent (%) and origin (%)', srid, ST_SRID(origin); + END IF; + xoff := ST_X(origin); + yoff := ST_Y(origin); + END IF; + + --RAISE DEBUG 'X offset: %', xoff; + --RAISE DEBUG 'Y offset: %', yoff; + + hw := width/2.0; + hh := height/2.0; + + xgrd := hw; + ygrd := hh; + --RAISE DEBUG 'X grid size: %', xgrd; + --RAISE DEBUG 'Y grid size: %', ygrd; + + hstep := width; + vstep := height; + + -- Tweak horizontal start on hstep grid from origin + hstart := xoff + ceil((ST_XMin(ext)-xoff)/hstep)*hstep; + --RAISE DEBUG 'hstart: %', hstart; + + -- Tweak vertical start on vstep grid from origin + vstart := yoff + ceil((ST_Ymin(ext)-yoff)/vstep)*vstep; + --RAISE DEBUG 'vstart: %', vstart; + + hend := ST_XMax(ext); + vend := ST_YMax(ext); + + --RAISE DEBUG 'hend: %', hend; + --RAISE DEBUG 'vend: %', vend; + + x := hstart; + WHILE x < hend LOOP -- over X + y := vstart; + h := ST_MakeEnvelope(x-hw, y-hh, x+hw, y+hh, srid); + WHILE y < vend LOOP -- over Y + RETURN NEXT h; + h := ST_Translate(h, 0, vstep); + y := yoff + round(((y + vstep)-yoff)/ygrd)*ygrd; -- round to grid + END LOOP; + x := xoff + round(((x + hstep)-xoff)/xgrd)*xgrd; -- round to grid + END LOOP; + + RETURN; +END +$$ LANGUAGE 'plpgsql' IMMUTABLE; + +-- +-- Calculate the equal interval bins for a given column +-- +-- @param in_array A numeric array of numbers to determine the best +-- to determine the bin boundary +-- +-- @param breaks The number of bins you want to find. +-- +-- +-- Returns: upper edges of bins +-- +-- + +CREATE OR REPLACE FUNCTION CDB_EqualIntervalBins ( in_array NUMERIC[], breaks INT ) RETURNS NUMERIC[] as $$ +DECLARE + diff numeric; + min_val numeric; + max_val numeric; + tmp_val numeric; + i INT := 1; + reply numeric[]; +BEGIN + SELECT min(e), max(e) INTO min_val, max_val FROM ( SELECT unnest(in_array) e ) x WHERE e IS NOT NULL; + diff = (max_val - min_val) / breaks::numeric; + LOOP + IF i < breaks THEN + tmp_val = min_val + i::numeric * diff; + reply = array_append(reply, tmp_val); + i := i+1; + ELSE + reply = array_append(reply, max_val); + EXIT; + END IF; + END LOOP; + RETURN reply; +END; +$$ language plpgsql IMMUTABLE; + +-- +-- Determine the Heads/Tails classifications from a numeric array +-- +-- @param in_array A numeric array of numbers to determine the best +-- bins based on the Heads/Tails method. +-- +-- @param breaks The number of bins you want to find. +-- +-- + +CREATE OR REPLACE FUNCTION CDB_HeadsTailsBins ( in_array NUMERIC[], breaks INT) RETURNS NUMERIC[] as $$ +DECLARE + element_count INT4; + arr_mean numeric; + i INT := 2; + reply numeric[]; +BEGIN + -- get the total size of our row + element_count := array_upper(in_array, 1) - array_lower(in_array, 1); + -- ensure the ordering of in_array + SELECT array_agg(e) INTO in_array FROM (SELECT unnest(in_array) e ORDER BY e) x; + -- stop if no rows + IF element_count IS NULL THEN + RETURN NULL; + END IF; + -- stop if our breaks are more than our input array size + IF element_count < breaks THEN + RETURN in_array; + END IF; + + -- get our mean value + SELECT avg(v) INTO arr_mean FROM ( SELECT unnest(in_array) as v ) x; + + reply = Array[arr_mean]; + -- slice our bread + LOOP + IF i > breaks THEN EXIT; END IF; + SELECT avg(e) INTO arr_mean FROM ( SELECT unnest(in_array) e) x WHERE e > reply[i-1]; + IF arr_mean IS NOT NULL THEN + reply = array_append(reply, arr_mean); + END IF; + i := i+1; + END LOOP; + RETURN reply; +END; +$$ language plpgsql IMMUTABLE; + +-- +-- Determine the Jenks classifications from a numeric array +-- +-- @param in_array A numeric array of numbers to determine the best +-- bins based on the Jenks method. +-- +-- @param breaks The number of bins you want to find. +-- +-- @param iterations The number of different starting positions to test. +-- +-- @param invert Optional wheter to return the top of each bin (default) +-- or the bottom. BOOLEAN, default=FALSE. +-- +-- + + +CREATE OR REPLACE FUNCTION CDB_JenksBins ( in_array NUMERIC[], breaks INT, iterations INT DEFAULT 5, invert BOOLEAN DEFAULT FALSE) RETURNS NUMERIC[] as $$ +DECLARE + element_count INT4; + arr_mean NUMERIC; + bot INT; + top INT; + tops INT[]; + classes INT[][]; + i INT := 1; j INT := 1; + curr_result NUMERIC[]; + best_result NUMERIC[]; + seedtarget TEXT; + quant NUMERIC[]; + shuffles INT; +BEGIN + -- get the total size of our row + element_count := array_length(in_array, 1); --array_upper(in_array, 1) - array_lower(in_array, 1); + -- ensure the ordering of in_array + SELECT array_agg(e) INTO in_array FROM (SELECT unnest(in_array) e ORDER BY e) x; + -- stop if no rows + IF element_count IS NULL THEN + RETURN NULL; + END IF; + -- stop if our breaks are more than our input array size + IF element_count < breaks THEN + RETURN in_array; + END IF; + + shuffles := LEAST(GREATEST(floor(2500000.0/(element_count::float*iterations::float)), 1), 750)::int; + -- get our mean value + SELECT avg(v) INTO arr_mean FROM ( SELECT unnest(in_array) as v ) x; + + -- assume best is actually Quantile + SELECT cdb_crankshaft.CDB_QuantileBins(in_array, breaks) INTO quant; + + -- if data is very very large, just return quant and be done + IF element_count > 5000000 THEN + RETURN quant; + END IF; + + -- change quant into bottom, top markers + LOOP + IF i = 1 THEN + bot = 1; + ELSE + -- use last top to find this bot + bot = top+1; + END IF; + IF i = breaks THEN + top = element_count; + ELSE + SELECT count(*) INTO top FROM ( SELECT unnest(in_array) as v) x WHERE v <= quant[i]; + END IF; + IF i = 1 THEN + classes = ARRAY[ARRAY[bot,top]]; + ELSE + classes = ARRAY_CAT(classes,ARRAY[bot,top]); + END IF; + IF i > breaks THEN EXIT; END IF; + i = i+1; + END LOOP; + + best_result = cdb_crankshaft.CDB_JenksBinsIteration( in_array, breaks, classes, invert, element_count, arr_mean, shuffles); + + --set the seed so we can ensure the same results + SELECT setseed(0.4567) INTO seedtarget; + --loop through random starting positions + LOOP + IF j > iterations-1 THEN EXIT; END IF; + i = 1; + tops = ARRAY[element_count]; + LOOP + IF i = breaks THEN EXIT; END IF; + SELECT array_agg(distinct e) INTO tops FROM (SELECT unnest(array_cat(tops, ARRAY[floor(random()*element_count::float)::int])) as e ORDER BY e) x WHERE e != 1; + i = array_length(tops, 1); + END LOOP; + i = 1; + LOOP + IF i > breaks THEN EXIT; END IF; + IF i = 1 THEN + bot = 1; + ELSE + bot = top+1; + END IF; + top = tops[i]; + IF i = 1 THEN + classes = ARRAY[ARRAY[bot,top]]; + ELSE + classes = ARRAY_CAT(classes,ARRAY[bot,top]); + END IF; + i := i+1; + END LOOP; + curr_result = cdb_crankshaft.CDB_JenksBinsIteration( in_array, breaks, classes, invert, element_count, arr_mean, shuffles); + + IF curr_result[1] > best_result[1] THEN + best_result = curr_result; + j = j-1; -- if we found a better result, add one more search + END IF; + j = j+1; + END LOOP; + + RETURN (best_result)[2:array_upper(best_result, 1)]; +END; +$$ language plpgsql IMMUTABLE; + + + +-- +-- Perform a single iteration of the Jenks classification +-- + +CREATE OR REPLACE FUNCTION CDB_JenksBinsIteration ( in_array NUMERIC[], breaks INT, classes INT[][], invert BOOLEAN, element_count INT4, arr_mean NUMERIC, max_search INT DEFAULT 50) RETURNS NUMERIC[] as $$ +DECLARE + tmp_val numeric; + new_classes int[][]; + tmp_class int[]; + i INT := 1; + j INT := 1; + side INT := 2; + sdam numeric; + gvf numeric := 0.0; + new_gvf numeric; + arr_gvf numeric[]; + class_avg numeric; + class_max_i INT; + class_min_i INT; + class_max numeric; + class_min numeric; + reply numeric[]; +BEGIN + + -- Calculate the sum of squared deviations from the array mean (SDAM). + SELECT sum((arr_mean - e)^2) INTO sdam FROM ( SELECT unnest(in_array) as e ) x; + --Identify the breaks for the lowest GVF + LOOP + i = 1; + LOOP + -- get our mean + SELECT avg(e) INTO class_avg FROM ( SELECT unnest(in_array[classes[i][1]:classes[i][2]]) as e) x; + -- find the deviation + SELECT sum((class_avg-e)^2) INTO tmp_val FROM ( SELECT unnest(in_array[classes[i][1]:classes[i][2]]) as e ) x; + IF i = 1 THEN + arr_gvf = ARRAY[tmp_val]; + -- init our min/max map for later + class_max = arr_gvf[i]; + class_min = arr_gvf[i]; + class_min_i = 1; + class_max_i = 1; + ELSE + arr_gvf = array_append(arr_gvf, tmp_val); + END IF; + i := i+1; + IF i > breaks THEN EXIT; END IF; + END LOOP; + -- calculate our new GVF + SELECT sdam-sum(e) INTO new_gvf FROM ( SELECT unnest(arr_gvf) as e ) x; + -- if no improvement was made, exit + IF new_gvf < gvf THEN EXIT; END IF; + gvf = new_gvf; + IF j > max_search THEN EXIT; END IF; + j = j+1; + i = 1; + LOOP + --establish directionality (uppward through classes or downward) + IF arr_gvf[i] < class_min THEN + class_min = arr_gvf[i]; + class_min_i = i; + END IF; + IF arr_gvf[i] > class_max THEN + class_max = arr_gvf[i]; + class_max_i = i; + END IF; + i := i+1; + IF i > breaks THEN EXIT; END IF; + END LOOP; + IF class_max_i > class_min_i THEN + class_min_i = class_max_i - 1; + ELSE + class_min_i = class_max_i + 1; + END IF; + --Move from higher class to a lower gid order + IF class_max_i > class_min_i THEN + classes[class_max_i][1] = classes[class_max_i][1] + 1; + classes[class_min_i][2] = classes[class_min_i][2] + 1; + ELSE -- Move from lower class UP into a higher class by gid + classes[class_max_i][2] = classes[class_max_i][2] - 1; + classes[class_min_i][1] = classes[class_min_i][1] - 1; + END IF; + END LOOP; + + i = 1; + LOOP + IF invert = TRUE THEN + side = 1; --default returns bottom side of breaks, invert returns top side + END IF; + reply = array_append(reply, in_array[classes[i][side]]); + i = i+1; + IF i > breaks THEN EXIT; END IF; + END LOOP; + + RETURN array_prepend(gvf, reply); + +END; +$$ language plpgsql IMMUTABLE; + + +-- +-- Determine the Quantile classifications from a numeric array +-- +-- @param in_array A numeric array of numbers to determine the best +-- bins based on the Quantile method. +-- +-- @param breaks The number of bins you want to find. +-- +-- +CREATE OR REPLACE FUNCTION CDB_QuantileBins ( in_array NUMERIC[], breaks INT) RETURNS NUMERIC[] as $$ +DECLARE + element_count INT4; + break_size numeric; + tmp_val numeric; + i INT := 1; + reply numeric[]; +BEGIN + -- sort our values + SELECT array_agg(e) INTO in_array FROM (SELECT unnest(in_array) e ORDER BY e ASC) x; + -- get the total size of our data + element_count := array_length(in_array, 1); + break_size := element_count::numeric / breaks; + -- slice our bread + LOOP + IF i < breaks THEN + IF break_size * i % 1 > 0 THEN + SELECT e INTO tmp_val FROM ( SELECT unnest(in_array) e LIMIT 1 OFFSET ceil(break_size * i) - 1) x; + ELSE + SELECT avg(e) INTO tmp_val FROM ( SELECT unnest(in_array) e LIMIT 2 OFFSET ceil(break_size * i) - 1 ) x; + END IF; + ELSIF i = breaks THEN + -- select the last value + SELECT max(e) INTO tmp_val FROM ( SELECT unnest(in_array) e ) x; + ELSE + EXIT; + END IF; + + reply = array_append(reply, tmp_val); + i := i+1; + END LOOP; + RETURN reply; +END; +$$ language plpgsql IMMUTABLE; diff --git a/release/crankshaft--0.4.0.sql b/release/crankshaft--0.4.0.sql new file mode 100644 index 0000000..0619987 --- /dev/null +++ b/release/crankshaft--0.4.0.sql @@ -0,0 +1,1948 @@ +--DO NOT MODIFY THIS FILE, IT IS GENERATED AUTOMATICALLY FROM SOURCES +-- Complain if script is sourced in psql, rather than via CREATE EXTENSION +\echo Use "CREATE EXTENSION crankshaft" to load this file. \quit +-- Version number of the extension release +CREATE OR REPLACE FUNCTION cdb_crankshaft_version() +RETURNS text AS $$ + SELECT '0.4.0'::text; +$$ language 'sql' STABLE STRICT; + +-- Internal identifier of the installed extension instence +-- e.g. 'dev' for current development version +CREATE OR REPLACE FUNCTION _cdb_crankshaft_internal_version() +RETURNS text AS $$ + SELECT installed_version FROM pg_available_extensions where name='crankshaft' and pg_available_extensions IS NOT NULL; +$$ language 'sql' STABLE STRICT; +-- Internal function. +-- Set the seeds of the RNGs (Random Number Generators) +-- used internally. +CREATE OR REPLACE FUNCTION +_cdb_random_seeds (seed_value INTEGER) RETURNS VOID +AS $$ + from crankshaft import random_seeds + random_seeds.set_random_seeds(seed_value) +$$ LANGUAGE plpythonu; +CREATE OR REPLACE FUNCTION + CDB_PyAggS(current_state Numeric[], current_row Numeric[]) + returns NUMERIC[] as $$ + BEGIN + if array_upper(current_state,1) is null then + RAISE NOTICE 'setting state %',array_upper(current_row,1); + current_state[1] = array_upper(current_row,1); + end if; + return array_cat(current_state,current_row) ; + END + $$ LANGUAGE plpgsql; + +-- Create aggregate if it did not exist +DO $$ +BEGIN + IF NOT EXISTS ( + SELECT * + FROM pg_catalog.pg_proc p + LEFT JOIN pg_catalog.pg_namespace n ON n.oid = p.pronamespace + WHERE n.nspname = 'cdb_crankshaft' + AND p.proname = 'cdb_pyagg' + AND p.proisagg) + THEN + CREATE AGGREGATE CDB_PyAgg(NUMERIC[]) ( + SFUNC = CDB_PyAggS, + STYPE = Numeric[], + INITCOND = "{}" + ); + END IF; +END +$$ LANGUAGE plpgsql; + +CREATE OR REPLACE FUNCTION + CDB_CreateAndPredictSegment( + target NUMERIC[], + features NUMERIC[], + target_features NUMERIC[], + target_ids NUMERIC[], + n_estimators INTEGER DEFAULT 1200, + max_depth INTEGER DEFAULT 3, + subsample DOUBLE PRECISION DEFAULT 0.5, + learning_rate DOUBLE PRECISION DEFAULT 0.01, + min_samples_leaf INTEGER DEFAULT 1) +RETURNS TABLE(cartodb_id NUMERIC, prediction NUMERIC, accuracy NUMERIC) +AS $$ + import numpy as np + import plpy + + from crankshaft.segmentation import create_and_predict_segment_agg + model_params = {'n_estimators': n_estimators, + 'max_depth': max_depth, + 'subsample': subsample, + 'learning_rate': learning_rate, + 'min_samples_leaf': min_samples_leaf} + + def unpack2D(data): + dimension = data.pop(0) + a = np.array(data, dtype=float) + return a.reshape(len(a)/dimension, dimension) + + return create_and_predict_segment_agg(np.array(target, dtype=float), + unpack2D(features), + unpack2D(target_features), + target_ids, + model_params) + +$$ LANGUAGE plpythonu; + +CREATE OR REPLACE FUNCTION + CDB_CreateAndPredictSegment ( + query TEXT, + variable_name TEXT, + target_table TEXT, + n_estimators INTEGER DEFAULT 1200, + max_depth INTEGER DEFAULT 3, + subsample DOUBLE PRECISION DEFAULT 0.5, + learning_rate DOUBLE PRECISION DEFAULT 0.01, + min_samples_leaf INTEGER DEFAULT 1) +RETURNS TABLE (cartodb_id TEXT, prediction NUMERIC, accuracy NUMERIC) +AS $$ + from crankshaft.segmentation import create_and_predict_segment + model_params = {'n_estimators': n_estimators, 'max_depth':max_depth, 'subsample' : subsample, 'learning_rate': learning_rate, 'min_samples_leaf' : min_samples_leaf} + return create_and_predict_segment(query,variable_name,target_table, model_params) +$$ LANGUAGE plpythonu; +CREATE OR REPLACE FUNCTION CDB_Gravity( + IN target_query text, + IN weight_column text, + IN source_query text, + IN pop_column text, + IN target bigint, + IN radius integer, + IN minval numeric DEFAULT -10e307 + ) +RETURNS TABLE( + the_geom geometry, + source_id bigint, + target_id bigint, + dist numeric, + h numeric, + hpop numeric) AS $$ +DECLARE + t_id bigint[]; + t_geom geometry[]; + t_weight numeric[]; + s_id bigint[]; + s_geom geometry[]; + s_pop numeric[]; +BEGIN + EXECUTE 'WITH foo as('+target_query+') SELECT array_agg(cartodb_id), array_agg(the_geom), array_agg(' || weight_column || ') FROM foo' INTO t_id, t_geom, t_weight; + EXECUTE 'WITH foo as('+source_query+') SELECT array_agg(cartodb_id), array_agg(the_geom), array_agg(' || pop_column || ') FROM foo' INTO s_id, s_geom, s_pop; + RETURN QUERY + SELECT g.* FROM t, s, CDB_Gravity(t_id, t_geom, t_weight, s_id, s_geom, s_pop, target, radius, minval) g; +END; +$$ language plpgsql; + +CREATE OR REPLACE FUNCTION CDB_Gravity( + IN t_id bigint[], + IN t_geom geometry[], + IN t_weight numeric[], + IN s_id bigint[], + IN s_geom geometry[], + IN s_pop numeric[], + IN target bigint, + IN radius integer, + IN minval numeric DEFAULT -10e307 + ) +RETURNS TABLE( + the_geom geometry, + source_id bigint, + target_id bigint, + dist numeric, + h numeric, + hpop numeric) AS $$ +DECLARE + t_type text; + s_type text; + t_center geometry[]; + s_center geometry[]; +BEGIN + t_type := GeometryType(t_geom[1]); + s_type := GeometryType(s_geom[1]); + IF t_type = 'POINT' THEN + t_center := t_geom; + ELSE + WITH tmp as (SELECT unnest(t_geom) as g) SELECT array_agg(ST_Centroid(g)) INTO t_center FROM tmp; + END IF; + IF s_type = 'POINT' THEN + s_center := s_geom; + ELSE + WITH tmp as (SELECT unnest(s_geom) as g) SELECT array_agg(ST_Centroid(g)) INTO s_center FROM tmp; + END IF; + RETURN QUERY + with target0 as( + SELECT unnest(t_center) as tc, unnest(t_weight) as tw, unnest(t_id) as td + ), + source0 as( + SELECT unnest(s_center) as sc, unnest(s_id) as sd, unnest (s_geom) as sg, unnest(s_pop) as sp + ), + prev0 as( + SELECT + source0.sg, + source0.sd as sourc_id, + coalesce(source0.sp,0) as sp, + target.td as targ_id, + coalesce(target.tw,0) as tw, + GREATEST(1.0,ST_Distance(geography(target.tc), geography(source0.sc)))::numeric as distance + FROM source0 + CROSS JOIN LATERAL + ( + SELECT + * + FROM target0 + WHERE tw > minval + AND ST_DWithin(geography(source0.sc), geography(tc), radius) + ) AS target + ), + deno as( + SELECT + sourc_id, + sum(tw/distance) as h_deno + FROM + prev0 + GROUP BY sourc_id + ) + SELECT + p.sg as the_geom, + p.sourc_id as source_id, + p.targ_id as target_id, + case when p.distance > 1 then p.distance else 0.0 end as dist, + 100*(p.tw/p.distance)/d.h_deno as h, + p.sp*(p.tw/p.distance)/d.h_deno as hpop + FROM + prev0 p, + deno d + WHERE + p.targ_id = target AND + p.sourc_id = d.sourc_id; +END; +$$ language plpgsql; +-- 0: nearest neighbor +-- 1: barymetric +-- 2: IDW + +CREATE OR REPLACE FUNCTION CDB_SpatialInterpolation( + IN query text, + IN point geometry, + IN method integer DEFAULT 1, + IN p1 numeric DEFAULT 0, + IN p2 numeric DEFAULT 0 + ) +RETURNS numeric AS +$$ +DECLARE + gs geometry[]; + vs numeric[]; + output numeric; +BEGIN + EXECUTE 'WITH a AS('||query||') SELECT array_agg(the_geom), array_agg(attrib) FROM a' INTO gs, vs; + SELECT CDB_SpatialInterpolation(gs, vs, point, method, p1,p2) INTO output FROM a; + + RETURN output; +END; +$$ +language plpgsql IMMUTABLE; + +CREATE OR REPLACE FUNCTION CDB_SpatialInterpolation( + IN geomin geometry[], + IN colin numeric[], + IN point geometry, + IN method integer DEFAULT 1, + IN p1 numeric DEFAULT 0, + IN p2 numeric DEFAULT 0 + ) +RETURNS numeric AS +$$ +DECLARE + gs geometry[]; + vs numeric[]; + gs2 geometry[]; + vs2 numeric[]; + g geometry; + vertex geometry[]; + sg numeric; + sa numeric; + sb numeric; + sc numeric; + va numeric; + vb numeric; + vc numeric; + output numeric; +BEGIN + output := -999.999; + -- nearest + IF method = 0 THEN + + WITH a as (SELECT unnest(geomin) as g, unnest(colin) as v) + SELECT a.v INTO output FROM a ORDER BY point<->a.g LIMIT 1; + RETURN output; + + -- barymetric + ELSIF method = 1 THEN + WITH a as (SELECT unnest(geomin) AS e), + b as (SELECT ST_DelaunayTriangles(ST_Collect(a.e),0.001, 0) AS t FROM a), + c as (SELECT (ST_Dump(t)).geom as v FROM b), + d as (SELECT v FROM c WHERE ST_Within(point, v)) + SELECT v INTO g FROM d; + IF g is null THEN + -- out of the realm of the input data + RETURN -888.888; + END IF; + -- vertex of the selected cell + WITH a AS (SELECT (ST_DumpPoints(g)).geom AS v) + SELECT array_agg(v) INTO vertex FROM a; + + -- retrieve the value of each vertex + WITH a AS(SELECT unnest(geomin) as geo, unnest(colin) as c) + SELECT c INTO va FROM a WHERE ST_Equals(geo, vertex[1]); + WITH a AS(SELECT unnest(geomin) as geo, unnest(colin) as c) + SELECT c INTO vb FROM a WHERE ST_Equals(geo, vertex[2]); + WITH a AS(SELECT unnest(geomin) as geo, unnest(colin) as c) + SELECT c INTO vc FROM a WHERE ST_Equals(geo, vertex[3]); + + SELECT ST_area(g), ST_area(ST_MakePolygon(ST_MakeLine(ARRAY[point, vertex[2], vertex[3], point]))), ST_area(ST_MakePolygon(ST_MakeLine(ARRAY[point, vertex[1], vertex[3], point]))), ST_area(ST_MakePolygon(ST_MakeLine(ARRAY[point,vertex[1],vertex[2], point]))) INTO sg, sa, sb, sc; + + output := (coalesce(sa,0) * coalesce(va,0) + coalesce(sb,0) * coalesce(vb,0) + coalesce(sc,0) * coalesce(vc,0)) / coalesce(sg); + RETURN output; + + -- IDW + -- p1: limit the number of neighbors, 0->no limit + -- p2: order of distance decay, 0-> order 1 + ELSIF method = 2 THEN + + IF p2 = 0 THEN + p2 := 1; + END IF; + + WITH a as (SELECT unnest(geomin) as g, unnest(colin) as v), + b as (SELECT a.g, a.v FROM a ORDER BY point<->a.g) + SELECT array_agg(b.g), array_agg(b.v) INTO gs, vs FROM b; + IF p1::integer>0 THEN + gs2:=gs; + vs2:=vs; + FOR i IN 1..p1 + LOOP + gs2 := gs2 || gs[i]; + vs2 := vs2 || vs[i]; + END LOOP; + ELSE + gs2:=gs; + vs2:=vs; + END IF; + + WITH a as (SELECT unnest(gs2) as g, unnest(vs2) as v), + b as ( + SELECT + (1/ST_distance(point, a.g)^p2::integer) as k, + (a.v/ST_distance(point, a.g)^p2::integer) as f + FROM a + ) + SELECT sum(b.f)/sum(b.k) INTO output FROM b; + RETURN output; + + END IF; + + RETURN -777.777; + +END; +$$ +language plpgsql IMMUTABLE; +-- ============================================================================================= +-- +-- CDB_Voronoi +-- +-- ============================================================================================= +CREATE OR REPLACE FUNCTION CDB_voronoi( + IN geomin geometry[], + IN buffer numeric DEFAULT 0.5, + IN tolerance numeric DEFAULT 1e-9 + ) +RETURNS geometry AS $$ +DECLARE + geomout geometry; +BEGIN + -- we need to make the geometry calculations in (pseudo)meters!!! + with a as ( + SELECT unnest(geomin) as g1 + ), + b as( + SELECT st_transform(g1, 3857) g2 from a + ) + SELECT array_agg(g2) INTO geomin from b; + + WITH + convexhull_1 as ( + SELECT + ST_ConvexHull(ST_Collect(geomin)) as g, + buffer * |/ (st_area(ST_ConvexHull(ST_Collect(geomin)))/PI()) as r + ), + clipper as( + SELECT + st_buffer(ST_MinimumBoundingCircle(a.g), buffer*a.r) as g + FROM convexhull_1 a + ), + env0 as ( + SELECT + (st_dumppoints(st_expand(a.g, buffer*a.r))).geom as e + FROM convexhull_1 a + ), + env as ( + SELECT + array_agg(env0.e) as e + FROM env0 + ), + sample AS ( + SELECT + ST_Collect(geomin || env.e) as geom + FROM env + ), + convexhull as ( + SELECT + ST_ConvexHull(ST_Collect(geomin)) as cg + ), + tin as ( + SELECT + ST_Dump(ST_DelaunayTriangles(geom, tolerance, 0)) as gd + FROM + sample + ), + tin_polygons as ( + SELECT + (gd).Path as id, + (gd).Geom as pg, + ST_Centroid(ST_MinimumBoundingCircle((gd).Geom, 180)) as ct + FROM tin + ), + tin_lines as ( + SELECT + id, + ST_ExteriorRing(pg) as lg + FROM tin_polygons + ), + tin_nodes as ( + SELECT + id, + ST_PointN(lg,1) p1, + ST_PointN(lg,2) p2, + ST_PointN(lg,3) p3 + FROM tin_lines + ), + tin_edges AS ( + SELECT + p.id, + UNNEST(ARRAY[ + ST_MakeLine(n.p1,n.p2) , + ST_MakeLine(n.p2,n.p3) , + ST_MakeLine(n.p3,n.p1)]) as Edge, + ST_Force2D(cdb_crankshaft._Find_Circle(n.p1,n.p2,n.p3)) as ct, + CASE WHEN st_distance(p.ct, ST_ExteriorRing(p.pg)) < tolerance THEN + TRUE + ELSE FALSE END AS ctx, + p.pg, + ST_within(p.ct, convexhull.cg) as ctin + FROM + tin_polygons p, + tin_nodes n, + convexhull + WHERE p.id = n.id + ), + voro_nodes as ( + SELECT + CASE WHEN x.ctx = TRUE THEN + ST_Centroid(x.edge) + ELSE + x.ct + END as xct, + CASE WHEN y.id is null THEN + CASE WHEN x.ctin = TRUE THEN + ST_SetSRID(ST_MakePoint( + ST_X(x.ct) + ((ST_X(ST_Centroid(x.edge)) - ST_X(x.ct)) * (1+buffer)), + ST_Y(x.ct) + ((ST_Y(ST_Centroid(x.edge)) - ST_Y(x.ct)) * (1+buffer)) + ), ST_SRID(x.ct)) + END + ELSE + y.ct + END as yct + FROM + tin_edges x + LEFT OUTER JOIN + tin_edges y + ON x.id <> y.id AND ST_Equals(x.edge, y.edge) + ), + voro_edges as( + SELECT + ST_LineMerge(ST_Collect(ST_MakeLine(xct, yct))) as v + FROM + voro_nodes + ), + voro_cells as( + SELECT + ST_Polygonize( + ST_Node( + ST_LineMerge( + ST_Union(v, ST_ExteriorRing( + ST_Convexhull(v) + ) + ) + ) + ) + ) as g + FROM + voro_edges + ), + voro_set as( + SELECT + (st_dump(v.g)).geom as g + FROM voro_cells v + ), + clipped_voro as( + SELECT + ST_intersection(c.g, v.g) as g + FROM + voro_set v, + clipper c + WHERE + ST_GeometryType(v.g) = 'ST_Polygon' + ) + SELECT + st_collect( + ST_Transform( + ST_ConvexHull(g), + 4326 + ) + ) + INTO geomout + FROM + clipped_voro; + RETURN geomout; +END; +$$ language plpgsql IMMUTABLE; + +/** ---------------------------------------------------------------------------------------- + * @function : FindCircle + * @precis : Function that determines if three points form a circle. If so a table containing + * centre and radius is returned. If not, a null table is returned. + * @version : 1.0.1 + * @param : p_pt1 : First point in curve + * @param : p_pt2 : Second point in curve + * @param : p_pt3 : Third point in curve + * @return : geometry : In which X,Y ordinates are the centre X, Y and the Z being the radius of found circle + * or NULL if three points do not form a circle. + * @history : Simon Greener - Feb 2012 - Original coding. + * Rafa de la Torre - Aug 2016 - Small fix for type checking + * @copyright : Simon Greener @ 2012 + * Licensed under a Creative Commons Attribution-Share Alike 2.5 Australia License. (http://creativecommons.org/licenses/by-sa/2.5/au/) +**/ +CREATE OR REPLACE FUNCTION _Find_Circle( + IN p_pt1 geometry, + IN p_pt2 geometry, + IN p_pt3 geometry) + RETURNS geometry AS +$BODY$ +DECLARE + v_Centre geometry; + v_radius NUMERIC; + v_CX NUMERIC; + v_CY NUMERIC; + v_dA NUMERIC; + v_dB NUMERIC; + v_dC NUMERIC; + v_dD NUMERIC; + v_dE NUMERIC; + v_dF NUMERIC; + v_dG NUMERIC; +BEGIN + IF ( p_pt1 IS NULL OR p_pt2 IS NULL OR p_pt3 IS NULL ) THEN + RAISE EXCEPTION 'All supplied points must be not null.'; + RETURN NULL; + END IF; + IF ( ST_GeometryType(p_pt1) <> 'ST_Point' OR + ST_GeometryType(p_pt2) <> 'ST_Point' OR + ST_GeometryType(p_pt3) <> 'ST_Point' ) THEN + RAISE EXCEPTION 'All supplied geometries must be points.'; + RETURN NULL; + END IF; + v_dA := ST_X(p_pt2) - ST_X(p_pt1); + v_dB := ST_Y(p_pt2) - ST_Y(p_pt1); + v_dC := ST_X(p_pt3) - ST_X(p_pt1); + v_dD := ST_Y(p_pt3) - ST_Y(p_pt1); + v_dE := v_dA * (ST_X(p_pt1) + ST_X(p_pt2)) + v_dB * (ST_Y(p_pt1) + ST_Y(p_pt2)); + v_dF := v_dC * (ST_X(p_pt1) + ST_X(p_pt3)) + v_dD * (ST_Y(p_pt1) + ST_Y(p_pt3)); + v_dG := 2.0 * (v_dA * (ST_Y(p_pt3) - ST_Y(p_pt2)) - v_dB * (ST_X(p_pt3) - ST_X(p_pt2))); + -- If v_dG is zero then the three points are collinear and no finite-radius + -- circle through them exists. + IF ( v_dG = 0 ) THEN + RETURN NULL; + ELSE + v_CX := (v_dD * v_dE - v_dB * v_dF) / v_dG; + v_CY := (v_dA * v_dF - v_dC * v_dE) / v_dG; + v_Radius := SQRT(POWER(ST_X(p_pt1) - v_CX,2) + POWER(ST_Y(p_pt1) - v_CY,2) ); + END IF; + RETURN ST_SetSRID(ST_MakePoint(v_CX, v_CY, v_radius),ST_Srid(p_pt1)); +END; +$BODY$ + LANGUAGE plpgsql VOLATILE STRICT; + +-- Moran's I Global Measure (public-facing) +CREATE OR REPLACE FUNCTION + CDB_AreasOfInterestGlobal( + subquery TEXT, + column_name TEXT, + w_type TEXT DEFAULT 'knn', + num_ngbrs INT DEFAULT 5, + permutations INT DEFAULT 99, + geom_col TEXT DEFAULT 'the_geom', + id_col TEXT DEFAULT 'cartodb_id') +RETURNS TABLE (moran NUMERIC, significance NUMERIC) +AS $$ + from crankshaft.clustering import moran_local + # TODO: use named parameters or a dictionary + return moran(subquery, column_name, w_type, num_ngbrs, permutations, geom_col, id_col) +$$ LANGUAGE plpythonu; + +-- Moran's I Local (internal function) +CREATE OR REPLACE FUNCTION + _CDB_AreasOfInterestLocal( + subquery TEXT, + column_name TEXT, + w_type TEXT, + num_ngbrs INT, + permutations INT, + geom_col TEXT, + id_col TEXT) +RETURNS TABLE (moran NUMERIC, quads TEXT, significance NUMERIC, rowid INT, vals NUMERIC) +AS $$ + from crankshaft.clustering import moran_local + # TODO: use named parameters or a dictionary + return moran_local(subquery, column_name, w_type, num_ngbrs, permutations, geom_col, id_col) +$$ LANGUAGE plpythonu; + +-- Moran's I Local (public-facing function) +CREATE OR REPLACE FUNCTION + CDB_AreasOfInterestLocal( + subquery TEXT, + column_name TEXT, + w_type TEXT DEFAULT 'knn', + num_ngbrs INT DEFAULT 5, + permutations INT DEFAULT 99, + geom_col TEXT DEFAULT 'the_geom', + id_col TEXT DEFAULT 'cartodb_id') +RETURNS TABLE (moran NUMERIC, quads TEXT, significance NUMERIC, rowid INT, vals NUMERIC) +AS $$ + + SELECT moran, quads, significance, rowid, vals + FROM cdb_crankshaft._CDB_AreasOfInterestLocal(subquery, column_name, w_type, num_ngbrs, permutations, geom_col, id_col); + +$$ LANGUAGE SQL; + +-- Moran's I only for HH and HL (public-facing function) +CREATE OR REPLACE FUNCTION + CDB_GetSpatialHotspots( + subquery TEXT, + column_name TEXT, + w_type TEXT DEFAULT 'knn', + num_ngbrs INT DEFAULT 5, + permutations INT DEFAULT 99, + geom_col TEXT DEFAULT 'the_geom', + id_col TEXT DEFAULT 'cartodb_id') + RETURNS TABLE (moran NUMERIC, quads TEXT, significance NUMERIC, rowid INT, vals NUMERIC) +AS $$ + + SELECT moran, quads, significance, rowid, vals + FROM cdb_crankshaft._CDB_AreasOfInterestLocal(subquery, column_name, w_type, num_ngbrs, permutations, geom_col, id_col) + WHERE quads IN ('HH', 'HL'); + +$$ LANGUAGE SQL; + +-- Moran's I only for LL and LH (public-facing function) +CREATE OR REPLACE FUNCTION + CDB_GetSpatialColdspots( + subquery TEXT, + attr TEXT, + w_type TEXT DEFAULT 'knn', + num_ngbrs INT DEFAULT 5, + permutations INT DEFAULT 99, + geom_col TEXT DEFAULT 'the_geom', + id_col TEXT DEFAULT 'cartodb_id') + RETURNS TABLE (moran NUMERIC, quads TEXT, significance NUMERIC, rowid INT, vals NUMERIC) +AS $$ + + SELECT moran, quads, significance, rowid, vals + FROM cdb_crankshaft._CDB_AreasOfInterestLocal(subquery, attr, w_type, num_ngbrs, permutations, geom_col, id_col) + WHERE quads IN ('LL', 'LH'); + +$$ LANGUAGE SQL; + +-- Moran's I only for LH and HL (public-facing function) +CREATE OR REPLACE FUNCTION + CDB_GetSpatialOutliers( + subquery TEXT, + attr TEXT, + w_type TEXT DEFAULT 'knn', + num_ngbrs INT DEFAULT 5, + permutations INT DEFAULT 99, + geom_col TEXT DEFAULT 'the_geom', + id_col TEXT DEFAULT 'cartodb_id') + RETURNS TABLE (moran NUMERIC, quads TEXT, significance NUMERIC, rowid INT, vals NUMERIC) +AS $$ + + SELECT moran, quads, significance, rowid, vals + FROM cdb_crankshaft._CDB_AreasOfInterestLocal(subquery, attr, w_type, num_ngbrs, permutations, geom_col, id_col) + WHERE quads IN ('HL', 'LH'); + +$$ LANGUAGE SQL; + +-- Moran's I Global Rate (public-facing function) +CREATE OR REPLACE FUNCTION + CDB_AreasOfInterestGlobalRate( + subquery TEXT, + numerator TEXT, + denominator TEXT, + w_type TEXT DEFAULT 'knn', + num_ngbrs INT DEFAULT 5, + permutations INT DEFAULT 99, + geom_col TEXT DEFAULT 'the_geom', + id_col TEXT DEFAULT 'cartodb_id') +RETURNS TABLE (moran FLOAT, significance FLOAT) +AS $$ + from crankshaft.clustering import moran_local + # TODO: use named parameters or a dictionary + return moran_rate(subquery, numerator, denominator, w_type, num_ngbrs, permutations, geom_col, id_col) +$$ LANGUAGE plpythonu; + + +-- Moran's I Local Rate (internal function) +CREATE OR REPLACE FUNCTION + _CDB_AreasOfInterestLocalRate( + subquery TEXT, + numerator TEXT, + denominator TEXT, + w_type TEXT, + num_ngbrs INT, + permutations INT, + geom_col TEXT, + id_col TEXT) +RETURNS +TABLE(moran NUMERIC, quads TEXT, significance NUMERIC, rowid INT, vals NUMERIC) +AS $$ + from crankshaft.clustering import moran_local_rate + # TODO: use named parameters or a dictionary + return moran_local_rate(subquery, numerator, denominator, w_type, num_ngbrs, permutations, geom_col, id_col) +$$ LANGUAGE plpythonu; + +-- Moran's I Local Rate (public-facing function) +CREATE OR REPLACE FUNCTION + CDB_AreasOfInterestLocalRate( + subquery TEXT, + numerator TEXT, + denominator TEXT, + w_type TEXT DEFAULT 'knn', + num_ngbrs INT DEFAULT 5, + permutations INT DEFAULT 99, + geom_col TEXT DEFAULT 'the_geom', + id_col TEXT DEFAULT 'cartodb_id') +RETURNS +TABLE(moran NUMERIC, quads TEXT, significance NUMERIC, rowid INT, vals NUMERIC) +AS $$ + + SELECT moran, quads, significance, rowid, vals + FROM cdb_crankshaft._CDB_AreasOfInterestLocalRate(subquery, numerator, denominator, w_type, num_ngbrs, permutations, geom_col, id_col); + +$$ LANGUAGE SQL; + +-- Moran's I Local Rate only for HH and HL (public-facing function) +CREATE OR REPLACE FUNCTION + CDB_GetSpatialHotspotsRate( + subquery TEXT, + numerator TEXT, + denominator TEXT, + w_type TEXT DEFAULT 'knn', + num_ngbrs INT DEFAULT 5, + permutations INT DEFAULT 99, + geom_col TEXT DEFAULT 'the_geom', + id_col TEXT DEFAULT 'cartodb_id') +RETURNS +TABLE(moran NUMERIC, quads TEXT, significance NUMERIC, rowid INT, vals NUMERIC) +AS $$ + + SELECT moran, quads, significance, rowid, vals + FROM cdb_crankshaft._CDB_AreasOfInterestLocalRate(subquery, numerator, denominator, w_type, num_ngbrs, permutations, geom_col, id_col) + WHERE quads IN ('HH', 'HL'); + +$$ LANGUAGE SQL; + +-- Moran's I Local Rate only for LL and LH (public-facing function) +CREATE OR REPLACE FUNCTION + CDB_GetSpatialColdspotsRate( + subquery TEXT, + numerator TEXT, + denominator TEXT, + w_type TEXT DEFAULT 'knn', + num_ngbrs INT DEFAULT 5, + permutations INT DEFAULT 99, + geom_col TEXT DEFAULT 'the_geom', + id_col TEXT DEFAULT 'cartodb_id') +RETURNS +TABLE(moran NUMERIC, quads TEXT, significance NUMERIC, rowid INT, vals NUMERIC) +AS $$ + + SELECT moran, quads, significance, rowid, vals + FROM cdb_crankshaft._CDB_AreasOfInterestLocalRate(subquery, numerator, denominator, w_type, num_ngbrs, permutations, geom_col, id_col) + WHERE quads IN ('LL', 'LH'); + +$$ LANGUAGE SQL; + +-- Moran's I Local Rate only for LH and HL (public-facing function) +CREATE OR REPLACE FUNCTION + CDB_GetSpatialOutliersRate( + subquery TEXT, + numerator TEXT, + denominator TEXT, + w_type TEXT DEFAULT 'knn', + num_ngbrs INT DEFAULT 5, + permutations INT DEFAULT 99, + geom_col TEXT DEFAULT 'the_geom', + id_col TEXT DEFAULT 'cartodb_id') +RETURNS +TABLE(moran NUMERIC, quads TEXT, significance NUMERIC, rowid INT, vals NUMERIC) +AS $$ + + SELECT moran, quads, significance, rowid, vals + FROM cdb_crankshaft._CDB_AreasOfInterestLocalRate(subquery, numerator, denominator, w_type, num_ngbrs, permutations, geom_col, id_col) + WHERE quads IN ('HL', 'LH'); + +$$ LANGUAGE SQL; +CREATE OR REPLACE FUNCTION CDB_KMeans(query text, no_clusters integer,no_init integer default 20) +RETURNS table (cartodb_id integer, cluster_no integer) as $$ + + from crankshaft.clustering import kmeans + return kmeans(query,no_clusters,no_init) + +$$ language plpythonu; + + +CREATE OR REPLACE FUNCTION CDB_WeightedMeanS(state Numeric[],the_geom GEOMETRY(Point, 4326), weight NUMERIC) +RETURNS Numeric[] AS +$$ +DECLARE + newX NUMERIC; + newY NUMERIC; + newW NUMERIC; +BEGIN + IF weight IS NULL OR the_geom IS NULL THEN + newX = state[1]; + newY = state[2]; + newW = state[3]; + ELSE + newX = state[1] + ST_X(the_geom)*weight; + newY = state[2] + ST_Y(the_geom)*weight; + newW = state[3] + weight; + END IF; + RETURN Array[newX,newY,newW]; + +END +$$ LANGUAGE plpgsql; + +CREATE OR REPLACE FUNCTION CDB_WeightedMeanF(state Numeric[]) +RETURNS GEOMETRY AS +$$ +BEGIN + IF state[3] = 0 THEN + RETURN ST_SetSRID(ST_MakePoint(state[1],state[2]), 4326); + ELSE + RETURN ST_SETSRID(ST_MakePoint(state[1]/state[3], state[2]/state[3]),4326); + END IF; +END +$$ LANGUAGE plpgsql; + +-- Create aggregate if it did not exist +DO $$ +BEGIN + IF NOT EXISTS ( + SELECT * + FROM pg_catalog.pg_proc p + LEFT JOIN pg_catalog.pg_namespace n ON n.oid = p.pronamespace + WHERE n.nspname = 'cdb_crankshaft' + AND p.proname = 'cdb_weightedmean' + AND p.proisagg) + THEN + CREATE AGGREGATE CDB_WeightedMean(geometry(Point, 4326), NUMERIC) ( + SFUNC = CDB_WeightedMeanS, + FINALFUNC = CDB_WeightedMeanF, + STYPE = Numeric[], + INITCOND = "{0.0,0.0,0.0}" + ); + END IF; +END +$$ LANGUAGE plpgsql; +-- Spatial Markov + +-- input table format: +-- id | geom | date_1 | date_2 | date_3 +-- 1 | Pt1 | 12.3 | 13.1 | 14.2 +-- 2 | Pt2 | 11.0 | 13.2 | 12.5 +-- ... +-- Sample Function call: +-- SELECT CDB_SpatialMarkov('SELECT * FROM real_estate', +-- Array['date_1', 'date_2', 'date_3']) + +CREATE OR REPLACE FUNCTION + CDB_SpatialMarkovTrend ( + subquery TEXT, + time_cols TEXT[], + num_classes INT DEFAULT 7, + w_type TEXT DEFAULT 'knn', + num_ngbrs INT DEFAULT 5, + permutations INT DEFAULT 99, + geom_col TEXT DEFAULT 'the_geom', + id_col TEXT DEFAULT 'cartodb_id') +RETURNS TABLE (trend NUMERIC, trend_up NUMERIC, trend_down NUMERIC, volatility NUMERIC, rowid INT) +AS $$ + + from crankshaft.space_time_dynamics import spatial_markov_trend + + ## TODO: use named parameters or a dictionary + return spatial_markov_trend(subquery, time_cols, num_classes, w_type, num_ngbrs, permutations, geom_col, id_col) +$$ LANGUAGE plpythonu; + +-- input table format: identical to above but in a predictable format +-- Sample function call: +-- SELECT cdb_spatial_markov('SELECT * FROM real_estate', +-- 'date_1') + + +-- CREATE OR REPLACE FUNCTION +-- cdb_spatial_markov ( +-- subquery TEXT, +-- time_col_min text, +-- time_col_max text, +-- date_format text, -- '_YYYY_MM_DD' +-- num_time_per_bin INT DEFAULT 1, +-- permutations INT DEFAULT 99, +-- geom_column TEXT DEFAULT 'the_geom', +-- id_col TEXT DEFAULT 'cartodb_id', +-- w_type TEXT DEFAULT 'knn', +-- num_ngbrs int DEFAULT 5) +-- RETURNS TABLE (moran FLOAT, quads TEXT, significance FLOAT, ids INT) +-- AS $$ +-- plpy.execute('SELECT cdb_crankshaft._cdb_crankshaft_activate_py()') +-- from crankshaft.clustering import moran_local +-- # TODO: use named parameters or a dictionary +-- return spatial_markov(subquery, time_cols, permutations, geom_column, id_col, w_type, num_ngbrs) +-- $$ LANGUAGE plpythonu; +-- +-- -- input table format: +-- -- id | geom | date | measurement +-- -- 1 | Pt1 | 12/3 | 13.2 +-- -- 2 | Pt2 | 11/5 | 11.3 +-- -- 3 | Pt1 | 11/13 | 12.9 +-- -- 4 | Pt3 | 12/19 | 10.1 +-- -- ... +-- +-- CREATE OR REPLACE FUNCTION +-- cdb_spatial_markov ( +-- subquery TEXT, +-- time_col text, +-- num_time_per_bin INT DEFAULT 1, +-- permutations INT DEFAULT 99, +-- geom_column TEXT DEFAULT 'the_geom', +-- id_col TEXT DEFAULT 'cartodb_id', +-- w_type TEXT DEFAULT 'knn', +-- num_ngbrs int DEFAULT 5) +-- RETURNS TABLE (moran FLOAT, quads TEXT, significance FLOAT, ids INT) +-- AS $$ +-- plpy.execute('SELECT cdb_crankshaft._cdb_crankshaft_activate_py()') +-- from crankshaft.clustering import moran_local +-- # TODO: use named parameters or a dictionary +-- return spatial_markov(subquery, time_cols, permutations, geom_column, id_col, w_type, num_ngbrs) +-- $$ LANGUAGE plpythonu; +-- Based on: +-- https://github.com/mapbox/polylabel/blob/master/index.js +-- https://sites.google.com/site/polesofinaccessibility/ +-- Requires: https://github.com/CartoDB/cartodb-postgresql + +-- Based on: +-- https://github.com/mapbox/polylabel/blob/master/index.js +-- https://sites.google.com/site/polesofinaccessibility/ +-- Requires: https://github.com/CartoDB/cartodb-postgresql + +CREATE OR REPLACE FUNCTION CDB_PIA( + IN polygon geometry, + IN tolerance numeric DEFAULT 1.0 + ) +RETURNS geometry AS $$ +DECLARE + env geometry[]; + cells geometry[]; + cell geometry; + best_c geometry; + best_d numeric; + test_d numeric; + test_mx numeric; + test_h numeric; + test_cells geometry[]; + width numeric; + height numeric; + h numeric; + i integer; + n integer; + sqr numeric; + p geometry; +BEGIN + sqr := |/2; + polygon := ST_Transform(polygon, 3857); + + -- grid #0 cell size + height := ST_YMax(polygon) - ST_YMin(polygon); + width := ST_XMax(polygon) - ST_XMin(polygon); + h := 0.5*LEAST(height, width); + + -- grid #0 + with c1 as( + SELECT cdb_crankshaft.CDB_RectangleGrid(polygon, h, h) as c + ) + SELECT array_agg(c) INTO cells FROM c1; + + -- 1st guess: centroid + best_d := cdb_crankshaft._Signed_Dist(polygon, ST_Centroid(Polygon)); + + -- looping the loop + n := array_length(cells,1); + i := 1; + LOOP + + EXIT WHEN i > n; + + cell := cells[i]; + i := i+1; + + -- cell side size, it's square + test_h := ST_XMax(cell) - ST_XMin(cell) ; + + -- check distance + test_d := cdb_crankshaft._Signed_Dist(polygon, ST_Centroid(cell)); + IF test_d > best_d THEN + best_d := test_d; + best_c := cells[i]; + END IF; + + -- longest distance within the cell + test_mx := test_d + (test_h/2 * sqr); + + -- if the cell has no chance to contains the desired point, continue + CONTINUE WHEN test_mx - best_d <= tolerance; + + -- resample the cell + with c1 as( + SELECT cdb_crankshaft.CDB_RectangleGrid(cell, test_h/2, test_h/2) as c + ) + SELECT array_agg(c) INTO test_cells FROM c1; + + -- concat the new cells to the former array + cells := cells || test_cells; + + -- prepare next iteration + n := array_length(cells,1); + + END LOOP; + + RETURN ST_transform(ST_Centroid(best_c), 4326); + +END; +$$ language plpgsql IMMUTABLE; + + +-- signed distance point to polygon with holes +-- negative is the point is out the polygon +CREATE OR REPLACE FUNCTION _Signed_Dist( + IN polygon geometry, + IN point geometry + ) +RETURNS numeric AS $$ +DECLARE + i integer; + within integer; + holes integer; + dist numeric; +BEGIN + dist := 1e999; + SELECT LEAST(dist, ST_distance(point, ST_ExteriorRing(polygon))::numeric) INTO dist; + SELECT CASE WHEN ST_Within(point,polygon) THEN 1 ELSE -1 END INTO within; + SELECT ST_NumInteriorRings(polygon) INTO holes; + IF holes > 0 THEN + FOR i IN 1..holes + LOOP + SELECT LEAST(dist, ST_distance(point, ST_InteriorRingN(polygon, i))::numeric) INTO dist; + END LOOP; + END IF; + dist := dist * within::numeric; + RETURN dist; +END; +$$ language plpgsql IMMUTABLE; +-- +-- Iterative densification of a set of points using Delaunay triangulation +-- the new points have as assigned value the average value of the 3 vertex (centroid) +-- +-- @param geomin - array of geometries (points) +-- +-- @param colin - array of numeric values in that points +-- +-- @param iterations - integer, number of iterations +-- +-- +-- Returns: TABLE(geomout geometry, colout numeric) +-- +-- +CREATE OR REPLACE FUNCTION CDB_Densify( + IN geomin geometry[], + IN colin numeric[], + IN iterations integer + ) +RETURNS TABLE(geomout geometry, colout numeric) AS $$ +DECLARE + geotemp geometry[]; + coltemp numeric[]; + i integer; + gs geometry[]; + g geometry; + vertex geometry[]; + va numeric; + vb numeric; + vc numeric; + center geometry; + centerval numeric; + tmp integer; +BEGIN + geotemp := geomin; + coltemp := colin; + FOR i IN 1..iterations + LOOP + -- generate TIN + WITH a as (SELECT unnest(geotemp) AS e), + b as (SELECT ST_DelaunayTriangles(ST_Collect(a.e),0.001, 0) AS t FROM a), + c as (SELECT (ST_Dump(t)).geom AS v FROM b) + SELECT array_agg(v) INTO gs FROM c; + -- loop cells + FOREACH g IN ARRAY gs + LOOP + -- append centroid + SELECT ST_Centroid(g) INTO center; + geotemp := array_append(geotemp, center); + -- retrieve the value of each vertex + WITH a AS (SELECT (ST_DumpPoints(g)).geom AS v) + SELECT array_agg(v) INTO vertex FROM a; + WITH a AS(SELECT unnest(geotemp) as geo, unnest(coltemp) as c) + SELECT c INTO va FROM a WHERE ST_Equals(geo, vertex[1]); + WITH a AS(SELECT unnest(geotemp) as geo, unnest(coltemp) as c) + SELECT c INTO vb FROM a WHERE ST_Equals(geo, vertex[2]); + WITH a AS(SELECT unnest(geotemp) as geo, unnest(coltemp) as c) + SELECT c INTO vc FROM a WHERE ST_Equals(geo, vertex[3]); + -- calc the value at the center + centerval := (va + vb + vc) / 3; + -- append the value + coltemp := array_append(coltemp, centerval); + END LOOP; + END LOOP; + RETURN QUERY SELECT unnest(geotemp ) as geomout, unnest(coltemp ) as colout; +END; +$$ language plpgsql IMMUTABLE; +CREATE OR REPLACE FUNCTION CDB_TINmap( + IN geomin geometry[], + IN colin numeric[], + IN iterations integer + ) +RETURNS TABLE(geomout geometry, colout numeric) AS $$ +DECLARE + p geometry[]; + vals numeric[]; + gs geometry[]; + g geometry; + vertex geometry[]; + centerval numeric; + va numeric; + vb numeric; + vc numeric; + coltemp numeric[]; +BEGIN + SELECT array_agg(dens.geomout), array_agg(dens.colout) INTO p, vals FROM cdb_crankshaft.CDB_Densify(geomin, colin, iterations) dens; + WITH a as (SELECT unnest(p) AS e), + b as (SELECT ST_DelaunayTriangles(ST_Collect(a.e),0.001, 0) AS t FROM a), + c as (SELECT (ST_Dump(t)).geom AS v FROM b) + SELECT array_agg(v) INTO gs FROM c; + FOREACH g IN ARRAY gs + LOOP + -- retrieve the vertex of each triangle + WITH a AS (SELECT (ST_DumpPoints(g)).geom AS v) + SELECT array_agg(v) INTO vertex FROM a; + -- retrieve the value of each vertex + WITH a AS(SELECT unnest(p) as geo, unnest(vals) as c) + SELECT c INTO va FROM a WHERE ST_Equals(geo, vertex[1]); + WITH a AS(SELECT unnest(p) as geo, unnest(vals) as c) + SELECT c INTO vb FROM a WHERE ST_Equals(geo, vertex[2]); + WITH a AS(SELECT unnest(p) as geo, unnest(vals) as c) + SELECT c INTO vc FROM a WHERE ST_Equals(geo, vertex[3]); + -- calc the value at the center + centerval := (va + vb + vc) / 3; + -- append the value + coltemp := array_append(coltemp, centerval); + END LOOP; + RETURN QUERY SELECT unnest(gs) as geomout, unnest(coltemp ) as colout; +END; +$$ language plpgsql IMMUTABLE; +CREATE OR REPLACE FUNCTION CDB_Contour( + IN geomin geometry[], + IN colin numeric[], + IN buffer numeric, + IN intmethod integer, + IN classmethod integer, + IN steps integer, + IN max_time integer DEFAULT 60000 + ) +RETURNS TABLE( + the_geom geometry, + bin integer, + min_value numeric, + max_value numeric, + avg_value numeric +) AS $$ +DECLARE + cell_count integer; + tin geometry[]; +BEGIN + -- calc the cell size in web mercator units + -- WITH center as ( + -- SELECT ST_centroid(ST_Collect(geomin)) as c + -- ) + -- SELECT + -- round(resolution / cos(ST_y(c) * pi()/180)) + -- INTO cell + -- FROM center; + -- raise notice 'Resol: %', cell; + + -- calc the optimal number of cells for the current dataset + SELECT + CASE intmethod + WHEN 0 THEN round(3.7745903782 * max_time - 9.4399210051 * array_length(geomin,1) - 1350.8778213073) + WHEN 1 THEN round(2.2855592156 * max_time - 87.285217133 * array_length(geomin,1) + 17255.7085601797) + WHEN 2 THEN round(0.9799471999 * max_time - 127.0334085369 * array_length(geomin,1) + 22707.9579721218) + ELSE 10000 + END INTO cell_count; + + -- we don't have iterative barycentric interpolation in CDB_interpolation, + -- and it's a costy function, so let's make a custom one here till + -- we update the code + -- tin := ARRAY[]::geometry[]; + IF intmethod=1 THEN + WITH + a as (SELECT unnest(geomin) AS e), + b as (SELECT ST_DelaunayTriangles(ST_Collect(a.e),0.001, 0) AS t FROM a), + c as (SELECT (ST_Dump(t)).geom as v FROM b) + SELECT array_agg(v) INTO tin FROM c; + END IF; + -- Delaunay stuff performed just ONCE!! + + -- magic + RETURN QUERY + WITH + convexhull as ( + SELECT + ST_ConvexHull(ST_Collect(geomin)) as g, + buffer * |/ st_area(ST_ConvexHull(ST_Collect(geomin)))/PI() as r + ), + envelope as ( + SELECT + st_expand(a.g, a.r) as e + FROM convexhull a + ), + envelope3857 as( + SELECT + ST_Transform(e, 3857) as geom + FROM envelope + ), + resolution as( + SELECT + round(|/ ( + ST_area(geom) / cell_count + )) as cell + FROM envelope3857 + ), + grid as( + SELECT + ST_Transform(cdb_crankshaft.CDB_RectangleGrid(e.geom, r.cell, r.cell), 4326) as geom + FROM envelope3857 e, resolution r + ), + interp as( + SELECT + geom, + CASE + WHEN intmethod=1 THEN cdb_crankshaft._interp_in_tin(geomin, colin, tin, ST_Centroid(geom)) + ELSE cdb_crankshaft.CDB_SpatialInterpolation(geomin, colin, ST_Centroid(geom), intmethod) + END as val + FROM grid + ), + classes as( + SELECT CASE + WHEN classmethod = 0 THEN + cdb_crankshaft.CDB_EqualIntervalBins(array_agg(val), steps) + WHEN classmethod = 1 THEN + cdb_crankshaft.CDB_HeadsTailsBins(array_agg(val), steps) + WHEN classmethod = 2 THEN + cdb_crankshaft.CDB_JenksBins(array_agg(val), steps) + ELSE + cdb_crankshaft.CDB_QuantileBins(array_agg(val), steps) + END as b + FROM interp + where val is not null + ), + classified as( + SELECT + i.*, + width_bucket(i.val, c.b) as bucket + FROM interp i left join classes c + ON 1=1 + ), + classified2 as( + SELECT + geom, + val, + CASE + WHEN bucket = steps THEN bucket - 1 + ELSE bucket + END as b + FROM classified + ), + final as( + SELECT + st_union(geom) as the_geom, + b as bin, + min(val) as min_value, + max(val) as max_value, + avg(val) as avg_value + FROM classified2 + GROUP BY bin + ) + SELECT + * + FROM final + where final.bin is not null + ; +END; +$$ language plpgsql; + + + +-- ===================================================================== +-- Interp in grid, so we can use barycentric with a precalculated tin (NNI) +-- ===================================================================== +CREATE OR REPLACE FUNCTION _interp_in_tin( + IN geomin geometry[], + IN colin numeric[], + IN tin geometry[], + IN point geometry + ) +RETURNS numeric AS +$$ +DECLARE + g geometry; + vertex geometry[]; + sg numeric; + sa numeric; + sb numeric; + sc numeric; + va numeric; + vb numeric; + vc numeric; + output numeric; +BEGIN + -- get the cell the point is within + WITH + a as (SELECT unnest(tin) as v), + b as (SELECT v FROM a WHERE ST_Within(point, v)) + SELECT v INTO g FROM b; + + -- if we're out of the data realm, + -- return null + IF g is null THEN + RETURN null; + END IF; + + -- vertex of the selected cell + WITH a AS ( + SELECT (ST_DumpPoints(g)).geom AS v + ) + SELECT array_agg(v) INTO vertex FROM a; + + -- retrieve the value of each vertex + WITH a AS(SELECT unnest(geomin) as geo, unnest(colin) as c) + SELECT c INTO va FROM a WHERE ST_Equals(geo, vertex[1]); + + WITH a AS(SELECT unnest(geomin) as geo, unnest(colin) as c) + SELECT c INTO vb FROM a WHERE ST_Equals(geo, vertex[2]); + + WITH a AS(SELECT unnest(geomin) as geo, unnest(colin) as c) + SELECT c INTO vc FROM a WHERE ST_Equals(geo, vertex[3]); + + -- calc the areas + SELECT + ST_area(g), + ST_area(ST_MakePolygon(ST_MakeLine(ARRAY[point, vertex[2], vertex[3], point]))), + ST_area(ST_MakePolygon(ST_MakeLine(ARRAY[point, vertex[1], vertex[3], point]))), + ST_area(ST_MakePolygon(ST_MakeLine(ARRAY[point,vertex[1],vertex[2], point]))) INTO sg, sa, sb, sc; + + output := (coalesce(sa,0) * coalesce(va,0) + coalesce(sb,0) * coalesce(vb,0) + coalesce(sc,0) * coalesce(vc,0)) / coalesce(sg,1); + RETURN output; +END; +$$ +language plpgsql; +-- Function by Stuart Lynn for a simple interpolation of a value +-- from a polygon table over an arbitrary polygon +-- (weighted by the area proportion overlapped) +-- Aereal weighting is a very simple form of aereal interpolation. +-- +-- Parameters: +-- * geom a Polygon geometry which defines the area where a value will be +-- estimated as the area-weighted sum of a given table/column +-- * target_table_name table name of the table that provides the values +-- * target_column column name of the column that provides the values +-- * schema_name optional parameter to defina the schema the target table +-- belongs to, which is necessary if its not in the search_path. +-- Note that target_table_name should never include the schema in it. +-- Return value: +-- Aereal-weighted interpolation of the column values over the geometry +CREATE OR REPLACE +FUNCTION cdb_overlap_sum(geom geometry, target_table_name text, target_column text, schema_name text DEFAULT NULL) + RETURNS numeric AS +$$ +DECLARE + result numeric; + qualified_name text; +BEGIN + IF schema_name IS NULL THEN + qualified_name := Format('%I', target_table_name); + ELSE + qualified_name := Format('%I.%s', schema_name, target_table_name); + END IF; + EXECUTE Format(' + SELECT sum(%I*ST_Area(St_Intersection($1, a.the_geom))/ST_Area(a.the_geom)) + FROM %s AS a + WHERE $1 && a.the_geom + ', target_column, qualified_name) + USING geom + INTO result; + RETURN result; +END; +$$ LANGUAGE plpgsql; +-- +-- Creates N points randomly distributed arround the polygon +-- +-- @param g - the geometry to be turned in to points +-- +-- @param no_points - the number of points to generate +-- +-- @params max_iter_per_point - the function generates points in the polygon's bounding box +-- and discards points which don't lie in the polygon. max_iter_per_point specifies how many +-- misses per point the funciton accepts before giving up. +-- +-- Returns: Multipoint with the requested points +CREATE OR REPLACE FUNCTION cdb_dot_density(geom geometry , no_points Integer, max_iter_per_point Integer DEFAULT 1000) +RETURNS GEOMETRY AS $$ +DECLARE + extent GEOMETRY; + test_point Geometry; + width NUMERIC; + height NUMERIC; + x0 NUMERIC; + y0 NUMERIC; + xp NUMERIC; + yp NUMERIC; + no_left INTEGER; + remaining_iterations INTEGER; + points GEOMETRY[]; + bbox_line GEOMETRY; + intersection_line GEOMETRY; +BEGIN + extent := ST_Envelope(geom); + width := ST_XMax(extent) - ST_XMIN(extent); + height := ST_YMax(extent) - ST_YMIN(extent); + x0 := ST_XMin(extent); + y0 := ST_YMin(extent); + no_left := no_points; + + LOOP + if(no_left=0) THEN + EXIT; + END IF; + yp = y0 + height*random(); + bbox_line = ST_MakeLine( + ST_SetSRID(ST_MakePoint(yp, x0),4326), + ST_SetSRID(ST_MakePoint(yp, x0+width),4326) + ); + intersection_line = ST_Intersection(bbox_line,geom); + test_point = ST_LineInterpolatePoint(st_makeline(st_linemerge(intersection_line)),random()); + points := points || test_point; + no_left = no_left - 1 ; + END LOOP; + RETURN ST_Collect(points); +END; +$$ +LANGUAGE plpgsql VOLATILE; +-- Make sure by default there are no permissions for publicuser +-- NOTE: this happens at extension creation time, as part of an implicit transaction. +-- REVOKE ALL PRIVILEGES ON SCHEMA cdb_crankshaft FROM PUBLIC, publicuser CASCADE; + +-- Grant permissions on the schema to publicuser (but just the schema) +GRANT USAGE ON SCHEMA cdb_crankshaft TO publicuser; + +-- Revoke execute permissions on all functions in the schema by default +-- REVOKE EXECUTE ON ALL FUNCTIONS IN SCHEMA cdb_crankshaft FROM PUBLIC, publicuser; +-- +-- Fill given extent with a rectangular coverage +-- +-- @param ext Extent to fill. Only rectangles with center point falling +-- inside the extent (or at the lower or leftmost edge) will +-- be emitted. The returned hexagons will have the same SRID +-- as this extent. +-- +-- @param width With of each rectangle +-- +-- @param height Height of each rectangle +-- +-- @param origin Optional origin to allow for exact tiling. +-- If omitted the origin will be 0,0. +-- The parameter is checked for having the same SRID +-- as the extent. +-- +-- +CREATE OR REPLACE FUNCTION CDB_RectangleGrid(ext GEOMETRY, width FLOAT8, height FLOAT8, origin GEOMETRY DEFAULT NULL) +RETURNS SETOF GEOMETRY +AS $$ +DECLARE + h GEOMETRY; -- rectangle cell + hstep FLOAT8; -- horizontal step + vstep FLOAT8; -- vertical step + hw FLOAT8; -- half width + hh FLOAT8; -- half height + vstart FLOAT8; + hstart FLOAT8; + hend FLOAT8; + vend FLOAT8; + xoff FLOAT8; + yoff FLOAT8; + xgrd FLOAT8; + ygrd FLOAT8; + x FLOAT8; + y FLOAT8; + srid INTEGER; +BEGIN + + srid := ST_SRID(ext); + + xoff := 0; + yoff := 0; + + IF origin IS NOT NULL THEN + IF ST_SRID(origin) != srid THEN + RAISE EXCEPTION 'SRID mismatch between extent (%) and origin (%)', srid, ST_SRID(origin); + END IF; + xoff := ST_X(origin); + yoff := ST_Y(origin); + END IF; + + --RAISE DEBUG 'X offset: %', xoff; + --RAISE DEBUG 'Y offset: %', yoff; + + hw := width/2.0; + hh := height/2.0; + + xgrd := hw; + ygrd := hh; + --RAISE DEBUG 'X grid size: %', xgrd; + --RAISE DEBUG 'Y grid size: %', ygrd; + + hstep := width; + vstep := height; + + -- Tweak horizontal start on hstep grid from origin + hstart := xoff + ceil((ST_XMin(ext)-xoff)/hstep)*hstep; + --RAISE DEBUG 'hstart: %', hstart; + + -- Tweak vertical start on vstep grid from origin + vstart := yoff + ceil((ST_Ymin(ext)-yoff)/vstep)*vstep; + --RAISE DEBUG 'vstart: %', vstart; + + hend := ST_XMax(ext); + vend := ST_YMax(ext); + + --RAISE DEBUG 'hend: %', hend; + --RAISE DEBUG 'vend: %', vend; + + x := hstart; + WHILE x < hend LOOP -- over X + y := vstart; + h := ST_MakeEnvelope(x-hw, y-hh, x+hw, y+hh, srid); + WHILE y < vend LOOP -- over Y + RETURN NEXT h; + h := ST_Translate(h, 0, vstep); + y := yoff + round(((y + vstep)-yoff)/ygrd)*ygrd; -- round to grid + END LOOP; + x := xoff + round(((x + hstep)-xoff)/xgrd)*xgrd; -- round to grid + END LOOP; + + RETURN; +END +$$ LANGUAGE 'plpgsql' IMMUTABLE; + +-- +-- Calculate the equal interval bins for a given column +-- +-- @param in_array A numeric array of numbers to determine the best +-- to determine the bin boundary +-- +-- @param breaks The number of bins you want to find. +-- +-- +-- Returns: upper edges of bins +-- +-- + +CREATE OR REPLACE FUNCTION CDB_EqualIntervalBins ( in_array NUMERIC[], breaks INT ) RETURNS NUMERIC[] as $$ +DECLARE + diff numeric; + min_val numeric; + max_val numeric; + tmp_val numeric; + i INT := 1; + reply numeric[]; +BEGIN + SELECT min(e), max(e) INTO min_val, max_val FROM ( SELECT unnest(in_array) e ) x WHERE e IS NOT NULL; + diff = (max_val - min_val) / breaks::numeric; + LOOP + IF i < breaks THEN + tmp_val = min_val + i::numeric * diff; + reply = array_append(reply, tmp_val); + i := i+1; + ELSE + reply = array_append(reply, max_val); + EXIT; + END IF; + END LOOP; + RETURN reply; +END; +$$ language plpgsql IMMUTABLE; + +-- +-- Determine the Heads/Tails classifications from a numeric array +-- +-- @param in_array A numeric array of numbers to determine the best +-- bins based on the Heads/Tails method. +-- +-- @param breaks The number of bins you want to find. +-- +-- + +CREATE OR REPLACE FUNCTION CDB_HeadsTailsBins ( in_array NUMERIC[], breaks INT) RETURNS NUMERIC[] as $$ +DECLARE + element_count INT4; + arr_mean numeric; + i INT := 2; + reply numeric[]; +BEGIN + -- get the total size of our row + element_count := array_upper(in_array, 1) - array_lower(in_array, 1); + -- ensure the ordering of in_array + SELECT array_agg(e) INTO in_array FROM (SELECT unnest(in_array) e ORDER BY e) x; + -- stop if no rows + IF element_count IS NULL THEN + RETURN NULL; + END IF; + -- stop if our breaks are more than our input array size + IF element_count < breaks THEN + RETURN in_array; + END IF; + + -- get our mean value + SELECT avg(v) INTO arr_mean FROM ( SELECT unnest(in_array) as v ) x; + + reply = Array[arr_mean]; + -- slice our bread + LOOP + IF i > breaks THEN EXIT; END IF; + SELECT avg(e) INTO arr_mean FROM ( SELECT unnest(in_array) e) x WHERE e > reply[i-1]; + IF arr_mean IS NOT NULL THEN + reply = array_append(reply, arr_mean); + END IF; + i := i+1; + END LOOP; + RETURN reply; +END; +$$ language plpgsql IMMUTABLE; + +-- +-- Determine the Jenks classifications from a numeric array +-- +-- @param in_array A numeric array of numbers to determine the best +-- bins based on the Jenks method. +-- +-- @param breaks The number of bins you want to find. +-- +-- @param iterations The number of different starting positions to test. +-- +-- @param invert Optional wheter to return the top of each bin (default) +-- or the bottom. BOOLEAN, default=FALSE. +-- +-- + + +CREATE OR REPLACE FUNCTION CDB_JenksBins ( in_array NUMERIC[], breaks INT, iterations INT DEFAULT 5, invert BOOLEAN DEFAULT FALSE) RETURNS NUMERIC[] as $$ +DECLARE + element_count INT4; + arr_mean NUMERIC; + bot INT; + top INT; + tops INT[]; + classes INT[][]; + i INT := 1; j INT := 1; + curr_result NUMERIC[]; + best_result NUMERIC[]; + seedtarget TEXT; + quant NUMERIC[]; + shuffles INT; +BEGIN + -- get the total size of our row + element_count := array_length(in_array, 1); --array_upper(in_array, 1) - array_lower(in_array, 1); + -- ensure the ordering of in_array + SELECT array_agg(e) INTO in_array FROM (SELECT unnest(in_array) e ORDER BY e) x; + -- stop if no rows + IF element_count IS NULL THEN + RETURN NULL; + END IF; + -- stop if our breaks are more than our input array size + IF element_count < breaks THEN + RETURN in_array; + END IF; + + shuffles := LEAST(GREATEST(floor(2500000.0/(element_count::float*iterations::float)), 1), 750)::int; + -- get our mean value + SELECT avg(v) INTO arr_mean FROM ( SELECT unnest(in_array) as v ) x; + + -- assume best is actually Quantile + SELECT cdb_crankshaft.CDB_QuantileBins(in_array, breaks) INTO quant; + + -- if data is very very large, just return quant and be done + IF element_count > 5000000 THEN + RETURN quant; + END IF; + + -- change quant into bottom, top markers + LOOP + IF i = 1 THEN + bot = 1; + ELSE + -- use last top to find this bot + bot = top+1; + END IF; + IF i = breaks THEN + top = element_count; + ELSE + SELECT count(*) INTO top FROM ( SELECT unnest(in_array) as v) x WHERE v <= quant[i]; + END IF; + IF i = 1 THEN + classes = ARRAY[ARRAY[bot,top]]; + ELSE + classes = ARRAY_CAT(classes,ARRAY[bot,top]); + END IF; + IF i > breaks THEN EXIT; END IF; + i = i+1; + END LOOP; + + best_result = cdb_crankshaft.CDB_JenksBinsIteration( in_array, breaks, classes, invert, element_count, arr_mean, shuffles); + + --set the seed so we can ensure the same results + SELECT setseed(0.4567) INTO seedtarget; + --loop through random starting positions + LOOP + IF j > iterations-1 THEN EXIT; END IF; + i = 1; + tops = ARRAY[element_count]; + LOOP + IF i = breaks THEN EXIT; END IF; + SELECT array_agg(distinct e) INTO tops FROM (SELECT unnest(array_cat(tops, ARRAY[floor(random()*element_count::float)::int])) as e ORDER BY e) x WHERE e != 1; + i = array_length(tops, 1); + END LOOP; + i = 1; + LOOP + IF i > breaks THEN EXIT; END IF; + IF i = 1 THEN + bot = 1; + ELSE + bot = top+1; + END IF; + top = tops[i]; + IF i = 1 THEN + classes = ARRAY[ARRAY[bot,top]]; + ELSE + classes = ARRAY_CAT(classes,ARRAY[bot,top]); + END IF; + i := i+1; + END LOOP; + curr_result = cdb_crankshaft.CDB_JenksBinsIteration( in_array, breaks, classes, invert, element_count, arr_mean, shuffles); + + IF curr_result[1] > best_result[1] THEN + best_result = curr_result; + j = j-1; -- if we found a better result, add one more search + END IF; + j = j+1; + END LOOP; + + RETURN (best_result)[2:array_upper(best_result, 1)]; +END; +$$ language plpgsql IMMUTABLE; + + + +-- +-- Perform a single iteration of the Jenks classification +-- + +CREATE OR REPLACE FUNCTION CDB_JenksBinsIteration ( in_array NUMERIC[], breaks INT, classes INT[][], invert BOOLEAN, element_count INT4, arr_mean NUMERIC, max_search INT DEFAULT 50) RETURNS NUMERIC[] as $$ +DECLARE + tmp_val numeric; + new_classes int[][]; + tmp_class int[]; + i INT := 1; + j INT := 1; + side INT := 2; + sdam numeric; + gvf numeric := 0.0; + new_gvf numeric; + arr_gvf numeric[]; + class_avg numeric; + class_max_i INT; + class_min_i INT; + class_max numeric; + class_min numeric; + reply numeric[]; +BEGIN + + -- Calculate the sum of squared deviations from the array mean (SDAM). + SELECT sum((arr_mean - e)^2) INTO sdam FROM ( SELECT unnest(in_array) as e ) x; + --Identify the breaks for the lowest GVF + LOOP + i = 1; + LOOP + -- get our mean + SELECT avg(e) INTO class_avg FROM ( SELECT unnest(in_array[classes[i][1]:classes[i][2]]) as e) x; + -- find the deviation + SELECT sum((class_avg-e)^2) INTO tmp_val FROM ( SELECT unnest(in_array[classes[i][1]:classes[i][2]]) as e ) x; + IF i = 1 THEN + arr_gvf = ARRAY[tmp_val]; + -- init our min/max map for later + class_max = arr_gvf[i]; + class_min = arr_gvf[i]; + class_min_i = 1; + class_max_i = 1; + ELSE + arr_gvf = array_append(arr_gvf, tmp_val); + END IF; + i := i+1; + IF i > breaks THEN EXIT; END IF; + END LOOP; + -- calculate our new GVF + SELECT sdam-sum(e) INTO new_gvf FROM ( SELECT unnest(arr_gvf) as e ) x; + -- if no improvement was made, exit + IF new_gvf < gvf THEN EXIT; END IF; + gvf = new_gvf; + IF j > max_search THEN EXIT; END IF; + j = j+1; + i = 1; + LOOP + --establish directionality (uppward through classes or downward) + IF arr_gvf[i] < class_min THEN + class_min = arr_gvf[i]; + class_min_i = i; + END IF; + IF arr_gvf[i] > class_max THEN + class_max = arr_gvf[i]; + class_max_i = i; + END IF; + i := i+1; + IF i > breaks THEN EXIT; END IF; + END LOOP; + IF class_max_i > class_min_i THEN + class_min_i = class_max_i - 1; + ELSE + class_min_i = class_max_i + 1; + END IF; + --Move from higher class to a lower gid order + IF class_max_i > class_min_i THEN + classes[class_max_i][1] = classes[class_max_i][1] + 1; + classes[class_min_i][2] = classes[class_min_i][2] + 1; + ELSE -- Move from lower class UP into a higher class by gid + classes[class_max_i][2] = classes[class_max_i][2] - 1; + classes[class_min_i][1] = classes[class_min_i][1] - 1; + END IF; + END LOOP; + + i = 1; + LOOP + IF invert = TRUE THEN + side = 1; --default returns bottom side of breaks, invert returns top side + END IF; + reply = array_append(reply, in_array[classes[i][side]]); + i = i+1; + IF i > breaks THEN EXIT; END IF; + END LOOP; + + RETURN array_prepend(gvf, reply); + +END; +$$ language plpgsql IMMUTABLE; + + +-- +-- Determine the Quantile classifications from a numeric array +-- +-- @param in_array A numeric array of numbers to determine the best +-- bins based on the Quantile method. +-- +-- @param breaks The number of bins you want to find. +-- +-- +CREATE OR REPLACE FUNCTION CDB_QuantileBins ( in_array NUMERIC[], breaks INT) RETURNS NUMERIC[] as $$ +DECLARE + element_count INT4; + break_size numeric; + tmp_val numeric; + i INT := 1; + reply numeric[]; +BEGIN + -- sort our values + SELECT array_agg(e) INTO in_array FROM (SELECT unnest(in_array) e ORDER BY e ASC) x; + -- get the total size of our data + element_count := array_length(in_array, 1); + break_size := element_count::numeric / breaks; + -- slice our bread + LOOP + IF i < breaks THEN + IF break_size * i % 1 > 0 THEN + SELECT e INTO tmp_val FROM ( SELECT unnest(in_array) e LIMIT 1 OFFSET ceil(break_size * i) - 1) x; + ELSE + SELECT avg(e) INTO tmp_val FROM ( SELECT unnest(in_array) e LIMIT 2 OFFSET ceil(break_size * i) - 1 ) x; + END IF; + ELSIF i = breaks THEN + -- select the last value + SELECT max(e) INTO tmp_val FROM ( SELECT unnest(in_array) e ) x; + ELSE + EXIT; + END IF; + + reply = array_append(reply, tmp_val); + i := i+1; + END LOOP; + RETURN reply; +END; +$$ language plpgsql IMMUTABLE; diff --git a/release/crankshaft.control b/release/crankshaft.control index bf7cf0f..7df077c 100644 --- a/release/crankshaft.control +++ b/release/crankshaft.control @@ -1,5 +1,5 @@ comment = 'CartoDB Spatial Analysis extension' -default_version = '0.3.1' +default_version = '0.4.0' requires = 'plpythonu, postgis' superuser = true schema = cdb_crankshaft diff --git a/release/python/0.4.0/crankshaft/crankshaft/__init__.py b/release/python/0.4.0/crankshaft/crankshaft/__init__.py new file mode 100644 index 0000000..4e06bc5 --- /dev/null +++ b/release/python/0.4.0/crankshaft/crankshaft/__init__.py @@ -0,0 +1,5 @@ +"""Import all modules""" +import crankshaft.random_seeds +import crankshaft.clustering +import crankshaft.space_time_dynamics +import crankshaft.segmentation diff --git a/release/python/0.4.0/crankshaft/crankshaft/clustering/__init__.py b/release/python/0.4.0/crankshaft/crankshaft/clustering/__init__.py new file mode 100644 index 0000000..ed34fe0 --- /dev/null +++ b/release/python/0.4.0/crankshaft/crankshaft/clustering/__init__.py @@ -0,0 +1,3 @@ +"""Import all functions from for clustering""" +from moran import * +from kmeans import * diff --git a/release/python/0.4.0/crankshaft/crankshaft/clustering/kmeans.py b/release/python/0.4.0/crankshaft/crankshaft/clustering/kmeans.py new file mode 100644 index 0000000..4134062 --- /dev/null +++ b/release/python/0.4.0/crankshaft/crankshaft/clustering/kmeans.py @@ -0,0 +1,18 @@ +from sklearn.cluster import KMeans +import plpy + +def kmeans(query, no_clusters, no_init=20): + data = plpy.execute('''select array_agg(cartodb_id order by cartodb_id) as ids, + array_agg(ST_X(the_geom) order by cartodb_id) xs, + array_agg(ST_Y(the_geom) order by cartodb_id) ys from ({query}) a + where the_geom is not null + '''.format(query=query)) + + xs = data[0]['xs'] + ys = data[0]['ys'] + ids = data[0]['ids'] + + km = KMeans(n_clusters= no_clusters, n_init=no_init) + labels = km.fit_predict(zip(xs,ys)) + return zip(ids,labels) + diff --git a/release/python/0.4.0/crankshaft/crankshaft/clustering/moran.py b/release/python/0.4.0/crankshaft/crankshaft/clustering/moran.py new file mode 100644 index 0000000..3282f5f --- /dev/null +++ b/release/python/0.4.0/crankshaft/crankshaft/clustering/moran.py @@ -0,0 +1,262 @@ +""" +Moran's I geostatistics (global clustering & outliers presence) +""" + +# TODO: Fill in local neighbors which have null/NoneType values with the +# average of the their neighborhood + +import pysal as ps +import plpy +from collections import OrderedDict + +# crankshaft module +import crankshaft.pysal_utils as pu + +# High level interface --------------------------------------- + +def moran(subquery, attr_name, + w_type, num_ngbrs, permutations, geom_col, id_col): + """ + Moran's I (global) + Implementation building neighbors with a PostGIS database and Moran's I + core clusters with PySAL. + Andy Eschbacher + """ + qvals = OrderedDict([("id_col", id_col), + ("attr1", attr_name), + ("geom_col", geom_col), + ("subquery", subquery), + ("num_ngbrs", num_ngbrs)]) + + query = pu.construct_neighbor_query(w_type, qvals) + + plpy.notice('** Query: %s' % query) + + try: + result = plpy.execute(query) + # if there are no neighbors, exit + if len(result) == 0: + return pu.empty_zipped_array(2) + plpy.notice('** Query returned with %d rows' % len(result)) + except plpy.SPIError: + plpy.error('Error: areas of interest query failed, check input parameters') + plpy.notice('** Query failed: "%s"' % query) + plpy.notice('** Error: %s' % plpy.SPIError) + return pu.empty_zipped_array(2) + + ## collect attributes + attr_vals = pu.get_attributes(result) + + ## calculate weights + weight = pu.get_weight(result, w_type, num_ngbrs) + + ## calculate moran global + moran_global = ps.esda.moran.Moran(attr_vals, weight, + permutations=permutations) + + return zip([moran_global.I], [moran_global.EI]) + +def moran_local(subquery, attr, + w_type, num_ngbrs, permutations, geom_col, id_col): + """ + Moran's I implementation for PL/Python + Andy Eschbacher + """ + + # geometries with attributes that are null are ignored + # resulting in a collection of not as near neighbors + + qvals = OrderedDict([("id_col", id_col), + ("attr1", attr), + ("geom_col", geom_col), + ("subquery", subquery), + ("num_ngbrs", num_ngbrs)]) + + query = pu.construct_neighbor_query(w_type, qvals) + + try: + result = plpy.execute(query) + # if there are no neighbors, exit + if len(result) == 0: + return pu.empty_zipped_array(5) + except plpy.SPIError: + plpy.error('Error: areas of interest query failed, check input parameters') + plpy.notice('** Query failed: "%s"' % query) + return pu.empty_zipped_array(5) + + attr_vals = pu.get_attributes(result) + weight = pu.get_weight(result, w_type, num_ngbrs) + + # calculate LISA values + lisa = ps.esda.moran.Moran_Local(attr_vals, weight, + permutations=permutations) + + # find quadrants for each geometry + quads = quad_position(lisa.q) + + return zip(lisa.Is, quads, lisa.p_sim, weight.id_order, lisa.y) + +def moran_rate(subquery, numerator, denominator, + w_type, num_ngbrs, permutations, geom_col, id_col): + """ + Moran's I Rate (global) + Andy Eschbacher + """ + qvals = OrderedDict([("id_col", id_col), + ("attr1", numerator), + ("attr2", denominator) + ("geom_col", geom_col), + ("subquery", subquery), + ("num_ngbrs", num_ngbrs)]) + + query = pu.construct_neighbor_query(w_type, qvals) + + plpy.notice('** Query: %s' % query) + + try: + result = plpy.execute(query) + # if there are no neighbors, exit + if len(result) == 0: + return pu.empty_zipped_array(2) + plpy.notice('** Query returned with %d rows' % len(result)) + except plpy.SPIError: + plpy.error('Error: areas of interest query failed, check input parameters') + plpy.notice('** Query failed: "%s"' % query) + plpy.notice('** Error: %s' % plpy.SPIError) + return pu.empty_zipped_array(2) + + ## collect attributes + numer = pu.get_attributes(result, 1) + denom = pu.get_attributes(result, 2) + + weight = pu.get_weight(result, w_type, num_ngbrs) + + ## calculate moran global rate + lisa_rate = ps.esda.moran.Moran_Rate(numer, denom, weight, + permutations=permutations) + + return zip([lisa_rate.I], [lisa_rate.EI]) + +def moran_local_rate(subquery, numerator, denominator, + w_type, num_ngbrs, permutations, geom_col, id_col): + """ + Moran's I Local Rate + Andy Eschbacher + """ + # geometries with values that are null are ignored + # resulting in a collection of not as near neighbors + + qvals = OrderedDict([("id_col", id_col), + ("numerator", numerator), + ("denominator", denominator), + ("geom_col", geom_col), + ("subquery", subquery), + ("num_ngbrs", num_ngbrs)]) + + query = pu.construct_neighbor_query(w_type, qvals) + + try: + result = plpy.execute(query) + # if there are no neighbors, exit + if len(result) == 0: + return pu.empty_zipped_array(5) + except plpy.SPIError: + plpy.error('Error: areas of interest query failed, check input parameters') + plpy.notice('** Query failed: "%s"' % query) + plpy.notice('** Error: %s' % plpy.SPIError) + return pu.empty_zipped_array(5) + + ## collect attributes + numer = pu.get_attributes(result, 1) + denom = pu.get_attributes(result, 2) + + weight = pu.get_weight(result, w_type, num_ngbrs) + + # calculate LISA values + lisa = ps.esda.moran.Moran_Local_Rate(numer, denom, weight, + permutations=permutations) + + # find quadrants for each geometry + quads = quad_position(lisa.q) + + return zip(lisa.Is, quads, lisa.p_sim, weight.id_order, lisa.y) + +def moran_local_bv(subquery, attr1, attr2, + permutations, geom_col, id_col, w_type, num_ngbrs): + """ + Moran's I (local) Bivariate (untested) + """ + plpy.notice('** Constructing query') + + qvals = OrderedDict([("id_col", id_col), + ("attr1", attr1), + ("attr2", attr2), + ("geom_col", geom_col), + ("subquery", subquery), + ("num_ngbrs", num_ngbrs)]) + + query = pu.construct_neighbor_query(w_type, qvals) + + try: + result = plpy.execute(query) + # if there are no neighbors, exit + if len(result) == 0: + return pu.empty_zipped_array(4) + except plpy.SPIError: + plpy.error("Error: areas of interest query failed, " \ + "check input parameters") + plpy.notice('** Query failed: "%s"' % query) + return pu.empty_zipped_array(4) + + ## collect attributes + attr1_vals = pu.get_attributes(result, 1) + attr2_vals = pu.get_attributes(result, 2) + + # create weights + weight = pu.get_weight(result, w_type, num_ngbrs) + + # calculate LISA values + lisa = ps.esda.moran.Moran_Local_BV(attr1_vals, attr2_vals, weight, + permutations=permutations) + + plpy.notice("len of Is: %d" % len(lisa.Is)) + + # find clustering of significance + lisa_sig = quad_position(lisa.q) + + plpy.notice('** Finished calculations') + + return zip(lisa.Is, lisa_sig, lisa.p_sim, weight.id_order) + +# Low level functions ---------------------------------------- + +def map_quads(coord): + """ + Map a quadrant number to Moran's I designation + HH=1, LH=2, LL=3, HL=4 + Input: + @param coord (int): quadrant of a specific measurement + Output: + classification (one of 'HH', 'LH', 'LL', or 'HL') + """ + if coord == 1: + return 'HH' + elif coord == 2: + return 'LH' + elif coord == 3: + return 'LL' + elif coord == 4: + return 'HL' + else: + return None + +def quad_position(quads): + """ + Produce Moran's I classification based of n + Input: + @param quads ndarray: an array of quads classified by + 1-4 (PySAL default) + Output: + @param list: an array of quads classied by 'HH', 'LL', etc. + """ + return [map_quads(q) for q in quads] diff --git a/release/python/0.4.0/crankshaft/crankshaft/pysal_utils/__init__.py b/release/python/0.4.0/crankshaft/crankshaft/pysal_utils/__init__.py new file mode 100644 index 0000000..fdf073b --- /dev/null +++ b/release/python/0.4.0/crankshaft/crankshaft/pysal_utils/__init__.py @@ -0,0 +1,2 @@ +"""Import all functions for pysal_utils""" +from crankshaft.pysal_utils.pysal_utils import * diff --git a/release/python/0.4.0/crankshaft/crankshaft/pysal_utils/pysal_utils.py b/release/python/0.4.0/crankshaft/crankshaft/pysal_utils/pysal_utils.py new file mode 100644 index 0000000..4622925 --- /dev/null +++ b/release/python/0.4.0/crankshaft/crankshaft/pysal_utils/pysal_utils.py @@ -0,0 +1,188 @@ +""" + Utilities module for generic PySAL functionality, mainly centered on + translating queries into numpy arrays or PySAL weights objects +""" + +import numpy as np +import pysal as ps + +def construct_neighbor_query(w_type, query_vals): + """Return query (a string) used for finding neighbors + @param w_type text: type of neighbors to calculate ('knn' or 'queen') + @param query_vals dict: values used to construct the query + """ + + if w_type.lower() == 'knn': + return knn(query_vals) + else: + return queen(query_vals) + +## Build weight object +def get_weight(query_res, w_type='knn', num_ngbrs=5): + """ + Construct PySAL weight from return value of query + @param query_res dict-like: query results with attributes and neighbors + """ + # if w_type.lower() == 'knn': + # row_normed_weights = [1.0 / float(num_ngbrs)] * num_ngbrs + # weights = {x['id']: row_normed_weights for x in query_res} + # else: + # weights = {x['id']: [1.0 / len(x['neighbors'])] * len(x['neighbors']) + # if len(x['neighbors']) > 0 + # else [] for x in query_res} + + neighbors = {x['id']: x['neighbors'] for x in query_res} + print 'len of neighbors: %d' % len(neighbors) + + built_weight = ps.W(neighbors) + built_weight.transform = 'r' + + return built_weight + +def query_attr_select(params): + """ + Create portion of SELECT statement for attributes inolved in query. + @param params: dict of information used in query (column names, + table name, etc.) + """ + + attr_string = "" + template = "i.\"%(col)s\"::numeric As attr%(alias_num)s, " + + if 'time_cols' in params: + ## if markov analysis + attrs = params['time_cols'] + + for idx, val in enumerate(attrs): + attr_string += template % {"col": val, "alias_num": idx + 1} + else: + ## if moran's analysis + attrs = [k for k in params + if k not in ('id_col', 'geom_col', 'subquery', 'num_ngbrs', 'subquery')] + + for idx, val in enumerate(sorted(attrs)): + attr_string += template % {"col": params[val], "alias_num": idx + 1} + + return attr_string + +def query_attr_where(params): + """ + Construct where conditions when building neighbors query + Create portion of WHERE clauses for weeding out NULL-valued geometries + Input: dict of params: + {'subquery': ..., + 'numerator': 'data1', + 'denominator': 'data2', + '': ...} + Output: 'idx_replace."data1" IS NOT NULL AND idx_replace."data2" IS NOT NULL' + Input: + {'subquery': ..., + 'time_cols': ['time1', 'time2', 'time3'], + 'etc': ...} + Output: 'idx_replace."time1" IS NOT NULL AND idx_replace."time2" IS NOT + NULL AND idx_replace."time3" IS NOT NULL' + """ + attr_string = [] + template = "idx_replace.\"%s\" IS NOT NULL" + + if 'time_cols' in params: + ## markov where clauses + attrs = params['time_cols'] + # add values to template + for attr in attrs: + attr_string.append(template % attr) + else: + ## moran where clauses + + # get keys + attrs = sorted([k for k in params + if k not in ('id_col', 'geom_col', 'subquery', 'num_ngbrs', 'subquery')]) + # add values to template + for attr in attrs: + attr_string.append(template % params[attr]) + + if len(attrs) == 2: + attr_string.append("idx_replace.\"%s\" <> 0" % params[attrs[1]]) + + out = " AND ".join(attr_string) + + return out + +def knn(params): + """SQL query for k-nearest neighbors. + @param vars: dict of values to fill template + """ + + attr_select = query_attr_select(params) + attr_where = query_attr_where(params) + + replacements = {"attr_select": attr_select, + "attr_where_i": attr_where.replace("idx_replace", "i"), + "attr_where_j": attr_where.replace("idx_replace", "j")} + + query = "SELECT " \ + "i.\"{id_col}\" As id, " \ + "%(attr_select)s" \ + "(SELECT ARRAY(SELECT j.\"{id_col}\" " \ + "FROM ({subquery}) As j " \ + "WHERE " \ + "i.\"{id_col}\" <> j.\"{id_col}\" AND " \ + "%(attr_where_j)s " \ + "ORDER BY " \ + "j.\"{geom_col}\" <-> i.\"{geom_col}\" ASC " \ + "LIMIT {num_ngbrs})" \ + ") As neighbors " \ + "FROM ({subquery}) As i " \ + "WHERE " \ + "%(attr_where_i)s " \ + "ORDER BY i.\"{id_col}\" ASC;" % replacements + + return query.format(**params) + +## SQL query for finding queens neighbors (all contiguous polygons) +def queen(params): + """SQL query for queen neighbors. + @param params dict: information to fill query + """ + attr_select = query_attr_select(params) + attr_where = query_attr_where(params) + + replacements = {"attr_select": attr_select, + "attr_where_i": attr_where.replace("idx_replace", "i"), + "attr_where_j": attr_where.replace("idx_replace", "j")} + + query = "SELECT " \ + "i.\"{id_col}\" As id, " \ + "%(attr_select)s" \ + "(SELECT ARRAY(SELECT j.\"{id_col}\" " \ + "FROM ({subquery}) As j " \ + "WHERE i.\"{id_col}\" <> j.\"{id_col}\" AND " \ + "ST_Touches(i.\"{geom_col}\", j.\"{geom_col}\") AND " \ + "%(attr_where_j)s)" \ + ") As neighbors " \ + "FROM ({subquery}) As i " \ + "WHERE " \ + "%(attr_where_i)s " \ + "ORDER BY i.\"{id_col}\" ASC;" % replacements + + return query.format(**params) + +## to add more weight methods open a ticket or pull request + +def get_attributes(query_res, attr_num=1): + """ + @param query_res: query results with attributes and neighbors + @param attr_num: attribute number (1, 2, ...) + """ + return np.array([x['attr' + str(attr_num)] for x in query_res], dtype=np.float) + +def empty_zipped_array(num_nones): + """ + prepare return values for cases of empty weights objects (no neighbors) + Input: + @param num_nones int: number of columns (e.g., 4) + Output: + [(None, None, None, None)] + """ + + return [tuple([None] * num_nones)] diff --git a/release/python/0.4.0/crankshaft/crankshaft/random_seeds.py b/release/python/0.4.0/crankshaft/crankshaft/random_seeds.py new file mode 100644 index 0000000..31958cb --- /dev/null +++ b/release/python/0.4.0/crankshaft/crankshaft/random_seeds.py @@ -0,0 +1,11 @@ +"""Random seed generator used for non-deterministic functions in crankshaft""" +import random +import numpy + +def set_random_seeds(value): + """ + Set the seeds of the RNGs (Random Number Generators) + used internally. + """ + random.seed(value) + numpy.random.seed(value) diff --git a/release/python/0.4.0/crankshaft/crankshaft/segmentation/__init__.py b/release/python/0.4.0/crankshaft/crankshaft/segmentation/__init__.py new file mode 100644 index 0000000..b825e85 --- /dev/null +++ b/release/python/0.4.0/crankshaft/crankshaft/segmentation/__init__.py @@ -0,0 +1 @@ +from segmentation import * diff --git a/release/python/0.4.0/crankshaft/crankshaft/segmentation/segmentation.py b/release/python/0.4.0/crankshaft/crankshaft/segmentation/segmentation.py new file mode 100644 index 0000000..ed61139 --- /dev/null +++ b/release/python/0.4.0/crankshaft/crankshaft/segmentation/segmentation.py @@ -0,0 +1,176 @@ +""" +Segmentation creation and prediction +""" + +import sklearn +import numpy as np +import plpy +from sklearn.ensemble import GradientBoostingRegressor +from sklearn import metrics +from sklearn.cross_validation import train_test_split + +# Lower level functions +#---------------------- + +def replace_nan_with_mean(array): + """ + Input: + @param array: an array of floats which may have null-valued entries + Output: + array with nans filled in with the mean of the dataset + """ + # returns an array of rows and column indices + indices = np.where(np.isnan(array)) + + # iterate through entries which have nan values + for row, col in zip(*indices): + array[row, col] = np.mean(array[~np.isnan(array[:, col]), col]) + + return array + +def get_data(variable, feature_columns, query): + """ + Fetch data from the database, clean, and package into + numpy arrays + Input: + @param variable: name of the target variable + @param feature_columns: list of column names + @param query: subquery that data is pulled from for the packaging + Output: + prepared data, packaged into NumPy arrays + """ + + columns = ','.join(['array_agg("{col}") As "{col}"'.format(col=col) for col in feature_columns]) + + try: + data = plpy.execute('''SELECT array_agg("{variable}") As target, {columns} FROM ({query}) As a'''.format( + variable=variable, + columns=columns, + query=query)) + except Exception, e: + plpy.error('Failed to access data to build segmentation model: %s' % e) + + # extract target data from plpy object + target = np.array(data[0]['target']) + + # put n feature data arrays into an n x m array of arrays + features = np.column_stack([np.array(data[0][col], dtype=float) for col in feature_columns]) + + return replace_nan_with_mean(target), replace_nan_with_mean(features) + +# High level interface +# -------------------- + +def create_and_predict_segment_agg(target, features, target_features, target_ids, model_parameters): + """ + Version of create_and_predict_segment that works on arrays that come stright form the SQL calling + the function. + + Input: + @param target: The 1D array of lenth NSamples containing the target variable we want the model to predict + @param features: Thw 2D array of size NSamples * NFeatures that form the imput to the model + @param target_ids: A 1D array of target_ids that will be used to associate the results of the prediction with the rows which they come from + @param model_parameters: A dictionary containing parameters for the model. + """ + + clean_target = replace_nan_with_mean(target) + clean_features = replace_nan_with_mean(features) + target_features = replace_nan_with_mean(target_features) + + model, accuracy = train_model(clean_target, clean_features, model_parameters, 0.2) + prediction = model.predict(target_features) + accuracy_array = [accuracy]*prediction.shape[0] + return zip(target_ids, prediction, np.full(prediction.shape, accuracy_array)) + + + +def create_and_predict_segment(query, variable, target_query, model_params): + """ + generate a segment with machine learning + Stuart Lynn + """ + + ## fetch column names + try: + columns = plpy.execute('SELECT * FROM ({query}) As a LIMIT 1 '.format(query=query))[0].keys() + except Exception, e: + plpy.error('Failed to build segmentation model: %s' % e) + + ## extract column names to be used in building the segmentation model + feature_columns = set(columns) - set([variable, 'cartodb_id', 'the_geom', 'the_geom_webmercator']) + ## get data from database + target, features = get_data(variable, feature_columns, query) + + model, accuracy = train_model(target, features, model_params, 0.2) + cartodb_ids, result = predict_segment(model, feature_columns, target_query) + accuracy_array = [accuracy]*result.shape[0] + return zip(cartodb_ids, result, accuracy_array) + + +def train_model(target, features, model_params, test_split): + """ + Train the Gradient Boosting model on the provided data and calculate the accuracy of the model + Input: + @param target: 1D Array of the variable that the model is to be trianed to predict + @param features: 2D Array NSamples * NFeatures to use in trining the model + @param model_params: A dictionary of model parameters, the full specification can be found on the + scikit learn page for [GradientBoostingRegressor](http://scikit-learn.org/stable/modules/generated/sklearn.ensemble.GradientBoostingRegressor.html) + @parma test_split: The fraction of the data to be withheld for testing the model / calculating the accuray + """ + features_train, features_test, target_train, target_test = train_test_split(features, target, test_size=test_split) + model = GradientBoostingRegressor(**model_params) + model.fit(features_train, target_train) + accuracy = calculate_model_accuracy(model, features, target) + return model, accuracy + +def calculate_model_accuracy(model, features, target): + """ + Calculate the mean squared error of the model prediction + Input: + @param model: model trained from input features + @param features: features to make a prediction from + @param target: target to compare prediction to + Output: + mean squared error of the model prection compared to the target + """ + prediction = model.predict(features) + return metrics.mean_squared_error(prediction, target) + +def predict_segment(model, features, target_query): + """ + Use the provided model to predict the values for the new feature set + Input: + @param model: The pretrained model + @features: A list of features to use in the model prediction (list of column names) + @target_query: The query to run to obtain the data to predict on and the cartdb_ids associated with it. + """ + + batch_size = 1000 + joined_features = ','.join(['"{0}"::numeric'.format(a) for a in features]) + + try: + cursor = plpy.cursor('SELECT Array[{joined_features}] As features FROM ({target_query}) As a'.format( + joined_features=joined_features, + target_query=target_query)) + except Exception, e: + plpy.error('Failed to build segmentation model: %s' % e) + + results = [] + + while True: + rows = cursor.fetch(batch_size) + if not rows: + break + batch = np.row_stack([np.array(row['features'], dtype=float) for row in rows]) + + #Need to fix this. Should be global mean. This will cause weird effects + batch = replace_nan_with_mean(batch) + prediction = model.predict(batch) + results.append(prediction) + + try: + cartodb_ids = plpy.execute('''SELECT array_agg(cartodb_id ORDER BY cartodb_id) As cartodb_ids FROM ({0}) As a'''.format(target_query))[0]['cartodb_ids'] + except Exception, e: + plpy.error('Failed to build segmentation model: %s' % e) + + return cartodb_ids, np.concatenate(results) diff --git a/release/python/0.4.0/crankshaft/crankshaft/space_time_dynamics/__init__.py b/release/python/0.4.0/crankshaft/crankshaft/space_time_dynamics/__init__.py new file mode 100644 index 0000000..a439286 --- /dev/null +++ b/release/python/0.4.0/crankshaft/crankshaft/space_time_dynamics/__init__.py @@ -0,0 +1,2 @@ +"""Import all functions from clustering libraries.""" +from markov import * diff --git a/release/python/0.4.0/crankshaft/crankshaft/space_time_dynamics/markov.py b/release/python/0.4.0/crankshaft/crankshaft/space_time_dynamics/markov.py new file mode 100644 index 0000000..bbf524d --- /dev/null +++ b/release/python/0.4.0/crankshaft/crankshaft/space_time_dynamics/markov.py @@ -0,0 +1,189 @@ +""" +Spatial dynamics measurements using Spatial Markov +""" + + +import numpy as np +import pysal as ps +import plpy +import crankshaft.pysal_utils as pu + +def spatial_markov_trend(subquery, time_cols, num_classes=7, + w_type='knn', num_ngbrs=5, permutations=0, + geom_col='the_geom', id_col='cartodb_id'): + """ + Predict the trends of a unit based on: + 1. history of its transitions to different classes (e.g., 1st quantile -> 2nd quantile) + 2. average class of its neighbors + + Inputs: + @param subquery string: e.g., SELECT the_geom, cartodb_id, + interesting_time_column FROM table_name + @param time_cols list of strings: list of strings of column names + @param num_classes (optional): number of classes to break distribution + of values into. Currently uses quantile bins. + @param w_type string (optional): weight type ('knn' or 'queen') + @param num_ngbrs int (optional): number of neighbors (if knn type) + @param permutations int (optional): number of permutations for test + stats + @param geom_col string (optional): name of column which contains the + geometries + @param id_col string (optional): name of column which has the ids of + the table + + Outputs: + @param trend_up float: probablity that a geom will move to a higher + class + @param trend_down float: probablity that a geom will move to a lower + class + @param trend float: (trend_up - trend_down) / trend_static + @param volatility float: a measure of the volatility based on + probability stddev(prob array) + """ + + if len(time_cols) < 2: + plpy.error('More than one time column needs to be passed') + + qvals = {"id_col": id_col, + "time_cols": time_cols, + "geom_col": geom_col, + "subquery": subquery, + "num_ngbrs": num_ngbrs} + + try: + query_result = plpy.execute( + pu.construct_neighbor_query(w_type, qvals) + ) + if len(query_result) == 0: + return zip([None], [None], [None], [None], [None]) + except plpy.SPIError, err: + plpy.debug('Query failed with exception %s: %s' % (err, pu.construct_neighbor_query(w_type, qvals))) + plpy.error('Query failed, check the input parameters') + return zip([None], [None], [None], [None], [None]) + + ## build weight + weights = pu.get_weight(query_result, w_type) + weights.transform = 'r' + + ## prep time data + t_data = get_time_data(query_result, time_cols) + + plpy.debug('shape of t_data %d, %d' % t_data.shape) + plpy.debug('number of weight objects: %d, %d' % (weights.sparse).shape) + plpy.debug('first num elements: %f' % t_data[0, 0]) + + sp_markov_result = ps.Spatial_Markov(t_data, + weights, + k=num_classes, + fixed=False, + permutations=permutations) + + ## get lag classes + lag_classes = ps.Quantiles( + ps.lag_spatial(weights, t_data[:, -1]), + k=num_classes).yb + + ## look up probablity distribution for each unit according to class and lag class + prob_dist = get_prob_dist(sp_markov_result.P, + lag_classes, + sp_markov_result.classes[:, -1]) + + ## find the ups and down and overall distribution of each cell + trend_up, trend_down, trend, volatility = get_prob_stats(prob_dist, + sp_markov_result.classes[:, -1]) + + ## output the results + return zip(trend, trend_up, trend_down, volatility, weights.id_order) + +def get_time_data(markov_data, time_cols): + """ + Extract the time columns and bin appropriately + """ + num_attrs = len(time_cols) + return np.array([[x['attr' + str(i)] for x in markov_data] + for i in range(1, num_attrs+1)], dtype=float).transpose() + +## not currently used +def rebin_data(time_data, num_time_per_bin): + """ + Convert an n x l matrix into an (n/m) x l matrix where the values are + reduced (averaged) for the intervening states: + 1 2 3 4 1.5 3.5 + 5 6 7 8 -> 5.5 7.5 + 9 8 7 6 8.5 6.5 + 5 4 3 2 4.5 2.5 + + if m = 2, the 4 x 4 matrix is transformed to a 2 x 4 matrix. + + This process effectively resamples the data at a longer time span n + units longer than the input data. + For cases when there is a remainder (remainder(5/3) = 2), the remaining + two columns are binned together as the last time period, while the + first three are binned together for the first period. + + Input: + @param time_data n x l ndarray: measurements of an attribute at + different time intervals + @param num_time_per_bin int: number of columns to average into a new + column + Output: + ceil(n / m) x l ndarray of resampled time series + """ + + if time_data.shape[1] % num_time_per_bin == 0: + ## if fit is perfect, then use it + n_max = time_data.shape[1] / num_time_per_bin + else: + ## fit remainders into an additional column + n_max = time_data.shape[1] / num_time_per_bin + 1 + + return np.array([time_data[:, num_time_per_bin * i:num_time_per_bin * (i+1)].mean(axis=1) + for i in range(n_max)]).T + +def get_prob_dist(transition_matrix, lag_indices, unit_indices): + """ + Given an array of transition matrices, look up the probability + associated with the arrangements passed + + Input: + @param transition_matrix ndarray[k,k,k]: + @param lag_indices ndarray: + @param unit_indices ndarray: + + Output: + Array of probability distributions + """ + + return np.array([transition_matrix[(lag_indices[i], unit_indices[i])] + for i in range(len(lag_indices))]) + +def get_prob_stats(prob_dist, unit_indices): + """ + get the statistics of the probability distributions + + Outputs: + @param trend_up ndarray(float): sum of probabilities for upward + movement (relative to the unit index of that prob) + @param trend_down ndarray(float): sum of probabilities for downward + movement (relative to the unit index of that prob) + @param trend ndarray(float): difference of upward and downward + movements + """ + + num_elements = len(unit_indices) + trend_up = np.empty(num_elements, dtype=float) + trend_down = np.empty(num_elements, dtype=float) + trend = np.empty(num_elements, dtype=float) + + for i in range(num_elements): + trend_up[i] = prob_dist[i, (unit_indices[i]+1):].sum() + trend_down[i] = prob_dist[i, :unit_indices[i]].sum() + if prob_dist[i, unit_indices[i]] > 0.0: + trend[i] = (trend_up[i] - trend_down[i]) / prob_dist[i, unit_indices[i]] + else: + trend[i] = None + + ## calculate volatility of distribution + volatility = prob_dist.std(axis=1) + + return trend_up, trend_down, trend, volatility diff --git a/release/python/0.4.0/crankshaft/setup.py b/release/python/0.4.0/crankshaft/setup.py new file mode 100644 index 0000000..cd8ad99 --- /dev/null +++ b/release/python/0.4.0/crankshaft/setup.py @@ -0,0 +1,49 @@ + +""" +CartoDB Spatial Analysis Python Library +See: +https://github.com/CartoDB/crankshaft +""" + +from setuptools import setup, find_packages + +setup( + name='crankshaft', + + version='0.0.0', + + description='CartoDB Spatial Analysis Python Library', + + url='https://github.com/CartoDB/crankshaft', + + author='Data Services Team - CartoDB', + author_email='dataservices@cartodb.com', + + license='MIT', + + classifiers=[ + 'Development Status :: 3 - Alpha', + 'Intended Audience :: Mapping comunity', + 'Topic :: Maps :: Mapping Tools', + 'License :: OSI Approved :: MIT License', + 'Programming Language :: Python :: 2.7', + ], + + keywords='maps mapping tools spatial analysis geostatistics', + + packages=find_packages(exclude=['contrib', 'docs', 'tests']), + + extras_require={ + 'dev': ['unittest'], + 'test': ['unittest', 'nose', 'mock'], + }, + + # The choice of component versions is dictated by what's + # provisioned in the production servers. + # IMPORTANT NOTE: please don't change this line. Instead issue a ticket to systems for evaluation. + install_requires=['joblib==0.8.3', 'numpy==1.6.1', 'scipy==0.14.0', 'pysal==1.11.2', 'scikit-learn==0.14.1'], + + requires=['pysal', 'numpy', 'sklearn'], + + test_suite='test' +) diff --git a/release/python/0.4.0/crankshaft/setup.py-r b/release/python/0.4.0/crankshaft/setup.py-r new file mode 100644 index 0000000..cd8ad99 --- /dev/null +++ b/release/python/0.4.0/crankshaft/setup.py-r @@ -0,0 +1,49 @@ + +""" +CartoDB Spatial Analysis Python Library +See: +https://github.com/CartoDB/crankshaft +""" + +from setuptools import setup, find_packages + +setup( + name='crankshaft', + + version='0.0.0', + + description='CartoDB Spatial Analysis Python Library', + + url='https://github.com/CartoDB/crankshaft', + + author='Data Services Team - CartoDB', + author_email='dataservices@cartodb.com', + + license='MIT', + + classifiers=[ + 'Development Status :: 3 - Alpha', + 'Intended Audience :: Mapping comunity', + 'Topic :: Maps :: Mapping Tools', + 'License :: OSI Approved :: MIT License', + 'Programming Language :: Python :: 2.7', + ], + + keywords='maps mapping tools spatial analysis geostatistics', + + packages=find_packages(exclude=['contrib', 'docs', 'tests']), + + extras_require={ + 'dev': ['unittest'], + 'test': ['unittest', 'nose', 'mock'], + }, + + # The choice of component versions is dictated by what's + # provisioned in the production servers. + # IMPORTANT NOTE: please don't change this line. Instead issue a ticket to systems for evaluation. + install_requires=['joblib==0.8.3', 'numpy==1.6.1', 'scipy==0.14.0', 'pysal==1.11.2', 'scikit-learn==0.14.1'], + + requires=['pysal', 'numpy', 'sklearn'], + + test_suite='test' +) diff --git a/release/python/0.4.0/crankshaft/test/fixtures/kmeans.json b/release/python/0.4.0/crankshaft/test/fixtures/kmeans.json new file mode 100644 index 0000000..8f31c79 --- /dev/null +++ b/release/python/0.4.0/crankshaft/test/fixtures/kmeans.json @@ -0,0 +1 @@ +[{"xs": [9.917239463463458, 9.042767302696836, 10.798929825304187, 8.763751051762995, 11.383882954810852, 11.018206993460897, 8.939526075734316, 9.636159342565252, 10.136336896960058, 11.480610059427342, 12.115011910725082, 9.173267848893428, 10.239300931201738, 8.00012512174072, 8.979962292282131, 9.318376124429575, 10.82259513754284, 10.391747171927115, 10.04904588886165, 9.96007160443463, -0.78825626804569, -0.3511819898577426, -1.2796410003764271, -0.3977049391203402, 2.4792311265774667, 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0.92652175166361039, "y2001": 0.94278865361566122, "id": 38, "y2008": 1.0036262573224608, "y2009": 0.98102350657197357}, {"neighbors": [29, 34, 38, 22, 35], "y1995": 0.970820642185237, "y1997": 0.94534081352108112, "y1996": 0.95320232993219844, "y1999": 0.93967000034446724, "y1998": 0.94215592860799646, "y2006": 0.91035556215514757, "y2007": 0.90430364292511256, "y2004": 0.92879505989982103, "y2005": 0.9211054223180335, "y2002": 0.93412151936513388, "y2003": 0.93501274320242933, "y2000": 0.93092108910210503, "y2001": 0.92662519262599163, "id": 39, "y2008": 0.89994694483851023, "y2009": 0.9007386435858511}, {"neighbors": [41, 37, 42, 30, 45], "y1995": 0.95861858457245008, "y1997": 0.98254810501535106, "y1996": 0.95774543235102894, "y1999": 0.98684823919808018, "y1998": 0.98919471947721893, "y2006": 0.97163003599581876, "y2007": 0.97007020126757271, "y2004": 0.9493488753775261, "y2005": 0.97152609359561659, "y2002": 0.95601578436851964, "y2003": 0.94905384541254967, "y2000": 0.98882204635713133, "y2001": 0.97662233890759653, "id": 40, "y2008": 0.97158948117089283, "y2009": 0.95884908006927827}, {"neighbors": [40, 45, 44, 37, 42], "y1995": 0.83980438854721107, "y1997": 0.85746999875029983, "y1996": 0.84726737166133714, "y1999": 0.85567509846023126, "y1998": 0.85467221160427542, "y2006": 0.8333891885768886, "y2007": 0.83511679264592342, "y2004": 0.81743586206088703, "y2005": 0.83550405700769481, "y2002": 0.84502402428191115, "y2003": 0.82645665158259707, "y2000": 0.84818516243622177, "y2001": 0.85265681182580899, "id": 41, "y2008": 0.82136617314598481, "y2009": 0.80921873783836296}, {"neighbors": [43, 40, 46, 37, 36], "y1995": 0.95118156405662746, "y1997": 0.94688098462868708, "y1996": 0.9466212002600608, "y1999": 0.95124410099780687, "y1998": 0.95085829660091703, "y2006": 0.96895367966714574, "y2007": 0.9700163384024274, "y2004": 0.97583768316642261, "y2005": 0.95571723704302525, "y2002": 0.96804411514198463, "y2003": 0.97136213864358201, "y2000": 0.95440787445922959, "y2001": 0.96364362764682376, "id": 42, "y2008": 0.97082732652905901, "y2009": 0.9878236640328002}, {"neighbors": [36, 42, 32, 27, 46], "y1995": 1.0891004415267045, "y1997": 1.0849289528525252, "y1996": 1.0824896838138709, "y1999": 1.0945424900391545, "y1998": 1.0865692335830259, "y2006": 1.1450297539219478, "y2007": 1.1447474729339102, "y2004": 1.1334273474293739, "y2005": 1.1468606844516303, "y2002": 1.1229257675733433, "y2003": 1.1302103089739621, "y2000": 1.1055818811158884, "y2001": 1.1214085953998059, "id": 43, "y2008": 1.1408403740471014, "y2009": 1.1614292649793569}, {"neighbors": [33, 41, 45, 35, 40], "y1995": 1.0633603345917013, "y1997": 1.0869149629649646, "y1996": 1.0736582323828732, "y1999": 1.1166986255755473, "y1998": 1.0976484597942771, "y2006": 1.0839806574563229, "y2007": 1.0983176831786272, "y2004": 1.0927882684985315, "y2005": 1.0700320368873319, "y2002": 1.0881584856466706, "y2003": 1.0804431312806149, "y2000": 1.1185670222649935, "y2001": 1.0976428286056732, "id": 44, "y2008": 1.0929823187788443, "y2009": 1.0917612486217978}, {"neighbors": [41, 44, 40, 35, 33], "y1995": 0.79772064970019041, "y1997": 0.7858115114280021, "y1996": 0.78829195801876151, "y1999": 0.77035744221561353, "y1998": 0.77615921755360906, "y2006": 0.79949806580432425, "y2007": 0.80172181625581262, "y2004": 0.79603865293896003, "y2005": 0.78966436120841943, "y2002": 0.81437881076636964, "y2003": 0.80788827809912023, "y2000": 0.77751193519846906, "y2001": 0.79902973574567659, "id": 45, "y2008": 0.82168154748053679, "y2009": 0.85587910681858015}, {"neighbors": [42, 43, 40, 36, 37], "y1995": 1.0052446952315301, "y1997": 1.0047589936197736, "y1996": 1.0000769567582628, "y1999": 1.0063956091903872, "y1998": 1.0061394183885444, "y2006": 0.97292595590233411, "y2007": 0.96519561197191939, "y2004": 0.99030032232474696, "y2005": 0.97682565346267858, "y2002": 1.0081498135355325, "y2003": 1.0057431552702318, "y2000": 1.0016297948675874, "y2001": 0.99860738542320637, "id": 46, "y2008": 0.9617340332161447, "y2009": 0.95890283625473927}, {"neighbors": [20, 6, 24, 25, 30], "y1995": 0.95808418788867844, "y1997": 0.9654440995572009, "y1996": 0.93825679674127938, "y1999": 0.96987289157318213, "y1998": 0.95561201303757848, "y2006": 1.1704973973021624, "y2007": 1.1702515395802287, "y2004": 1.0533361880299275, "y2005": 1.0983262971945267, "y2002": 1.0078119390756035, "y2003": 1.0348423554112989, "y2000": 0.96608031008233231, "y2001": 0.99727184521431422, "id": 47, "y2008": 1.1873055260044207, "y2009": 1.1424264534188653}] diff --git a/release/python/0.4.0/crankshaft/test/helper.py b/release/python/0.4.0/crankshaft/test/helper.py new file mode 100644 index 0000000..7d28b94 --- /dev/null +++ b/release/python/0.4.0/crankshaft/test/helper.py @@ -0,0 +1,13 @@ +import unittest + +from mock_plpy import MockPlPy +plpy = MockPlPy() + +import sys +sys.modules['plpy'] = plpy + +import os + +def fixture_file(name): + dir = os.path.dirname(os.path.realpath(__file__)) + return os.path.join(dir, 'fixtures', name) diff --git a/release/python/0.4.0/crankshaft/test/mock_plpy.py b/release/python/0.4.0/crankshaft/test/mock_plpy.py new file mode 100644 index 0000000..a982ebe --- /dev/null +++ b/release/python/0.4.0/crankshaft/test/mock_plpy.py @@ -0,0 +1,52 @@ +import re + +class MockCursor: + def __init__(self, data): + self.cursor_pos = 0 + self.data = data + + def fetch(self, batch_size): + batch = self.data[self.cursor_pos : self.cursor_pos + batch_size] + self.cursor_pos += batch_size + return batch + + +class MockPlPy: + def __init__(self): + self._reset() + + def _reset(self): + self.infos = [] + self.notices = [] + self.debugs = [] + self.logs = [] + self.warnings = [] + self.errors = [] + self.fatals = [] + self.executes = [] + self.results = [] + self.prepares = [] + self.results = [] + + def _define_result(self, query, result): + pattern = re.compile(query, re.IGNORECASE | re.MULTILINE) + self.results.append([pattern, result]) + + def notice(self, msg): + self.notices.append(msg) + + def debug(self, msg): + self.notices.append(msg) + + def info(self, msg): + self.infos.append(msg) + + def cursor(self, query): + data = self.execute(query) + return MockCursor(data) + + def execute(self, query): # TODO: additional arguments + for result in self.results: + if result[0].match(query): + return result[1] + return [] diff --git a/release/python/0.4.0/crankshaft/test/test_cluster_kmeans.py b/release/python/0.4.0/crankshaft/test/test_cluster_kmeans.py new file mode 100644 index 0000000..aba8e07 --- /dev/null +++ b/release/python/0.4.0/crankshaft/test/test_cluster_kmeans.py @@ -0,0 +1,38 @@ +import unittest +import numpy as np + + +# from mock_plpy import MockPlPy +# plpy = MockPlPy() +# +# import sys +# sys.modules['plpy'] = plpy +from helper import plpy, fixture_file +import numpy as np +import crankshaft.clustering as cc +import crankshaft.pysal_utils as pu +from crankshaft import random_seeds +import json + +class KMeansTest(unittest.TestCase): + """Testing class for Moran's I functions""" + + def setUp(self): + plpy._reset() + self.cluster_data = json.loads(open(fixture_file('kmeans.json')).read()) + self.params = {"subquery": "select * from table", + "no_clusters": "10" + } + + def test_kmeans(self): + data = self.cluster_data + plpy._define_result('select' ,data) + clusters = cc.kmeans('subquery', 2) + labels = [a[1] for a in clusters] + c1 = [a for a in clusters if a[1]==0] + c2 = [a for a in clusters if a[1]==1] + + self.assertEqual(len(np.unique(labels)),2) + self.assertEqual(len(c1),20) + self.assertEqual(len(c2),20) + diff --git a/release/python/0.4.0/crankshaft/test/test_clustering_moran.py b/release/python/0.4.0/crankshaft/test/test_clustering_moran.py new file mode 100644 index 0000000..2b683cf --- /dev/null +++ b/release/python/0.4.0/crankshaft/test/test_clustering_moran.py @@ -0,0 +1,88 @@ +import unittest +import numpy as np + + +# from mock_plpy import MockPlPy +# plpy = MockPlPy() +# +# import sys +# sys.modules['plpy'] = plpy +from helper import plpy, fixture_file + +import crankshaft.clustering as cc +import crankshaft.pysal_utils as pu +from crankshaft import random_seeds +import json + +class MoranTest(unittest.TestCase): + """Testing class for Moran's I functions""" + + def setUp(self): + plpy._reset() + self.params = {"id_col": "cartodb_id", + "attr1": "andy", + "attr2": "jay_z", + "subquery": "SELECT * FROM a_list", + "geom_col": "the_geom", + "num_ngbrs": 321} + self.params_markov = {"id_col": "cartodb_id", + "time_cols": ["_2013_dec", "_2014_jan", "_2014_feb"], + "subquery": "SELECT * FROM a_list", + "geom_col": "the_geom", + "num_ngbrs": 321} + self.neighbors_data = json.loads(open(fixture_file('neighbors.json')).read()) + self.moran_data = json.loads(open(fixture_file('moran.json')).read()) + + def test_map_quads(self): + """Test map_quads""" + self.assertEqual(cc.map_quads(1), 'HH') + self.assertEqual(cc.map_quads(2), 'LH') + self.assertEqual(cc.map_quads(3), 'LL') + self.assertEqual(cc.map_quads(4), 'HL') + self.assertEqual(cc.map_quads(33), None) + self.assertEqual(cc.map_quads('andy'), None) + + def test_quad_position(self): + """Test lisa_sig_vals""" + + quads = np.array([1, 2, 3, 4], np.int) + + ans = np.array(['HH', 'LH', 'LL', 'HL']) + test_ans = cc.quad_position(quads) + + self.assertTrue((test_ans == ans).all()) + + def test_moran_local(self): + """Test Moran's I local""" + data = [ { 'id': d['id'], 'attr1': d['value'], 'neighbors': d['neighbors'] } for d in self.neighbors_data] + plpy._define_result('select', data) + random_seeds.set_random_seeds(1234) + result = cc.moran_local('subquery', 'value', 'knn', 5, 99, 'the_geom', 'cartodb_id') + result = [(row[0], row[1]) for row in result] + expected = self.moran_data + for ([res_val, res_quad], [exp_val, exp_quad]) in zip(result, expected): + self.assertAlmostEqual(res_val, exp_val) + self.assertEqual(res_quad, exp_quad) + + def test_moran_local_rate(self): + """Test Moran's I rate""" + data = [ { 'id': d['id'], 'attr1': d['value'], 'attr2': 1, 'neighbors': d['neighbors'] } for d in self.neighbors_data] + plpy._define_result('select', data) + random_seeds.set_random_seeds(1234) + result = cc.moran_local_rate('subquery', 'numerator', 'denominator', 'knn', 5, 99, 'the_geom', 'cartodb_id') + print 'result == None? ', result == None + result = [(row[0], row[1]) for row in result] + expected = self.moran_data + for ([res_val, res_quad], [exp_val, exp_quad]) in zip(result, expected): + self.assertAlmostEqual(res_val, exp_val) + + def test_moran(self): + """Test Moran's I global""" + data = [{ 'id': d['id'], 'attr1': d['value'], 'neighbors': d['neighbors'] } for d in self.neighbors_data] + plpy._define_result('select', data) + random_seeds.set_random_seeds(1235) + result = cc.moran('table', 'value', 'knn', 5, 99, 'the_geom', 'cartodb_id') + print 'result == None?', result == None + result_moran = result[0][0] + expected_moran = np.array([row[0] for row in self.moran_data]).mean() + self.assertAlmostEqual(expected_moran, result_moran, delta=10e-2) diff --git a/release/python/0.4.0/crankshaft/test/test_pysal_utils.py b/release/python/0.4.0/crankshaft/test/test_pysal_utils.py new file mode 100644 index 0000000..171fdbc --- /dev/null +++ b/release/python/0.4.0/crankshaft/test/test_pysal_utils.py @@ -0,0 +1,142 @@ +import unittest + +import crankshaft.pysal_utils as pu +from crankshaft import random_seeds + + +class PysalUtilsTest(unittest.TestCase): + """Testing class for utility functions related to PySAL integrations""" + + def setUp(self): + self.params = {"id_col": "cartodb_id", + "attr1": "andy", + "attr2": "jay_z", + "subquery": "SELECT * FROM a_list", + "geom_col": "the_geom", + "num_ngbrs": 321} + + self.params_array = {"id_col": "cartodb_id", + "time_cols": ["_2013_dec", "_2014_jan", "_2014_feb"], + "subquery": "SELECT * FROM a_list", + "geom_col": "the_geom", + "num_ngbrs": 321} + + def test_query_attr_select(self): + """Test query_attr_select""" + + ans = "i.\"andy\"::numeric As attr1, " \ + "i.\"jay_z\"::numeric As attr2, " + + ans_array = "i.\"_2013_dec\"::numeric As attr1, " \ + "i.\"_2014_jan\"::numeric As attr2, " \ + "i.\"_2014_feb\"::numeric As attr3, " + + self.assertEqual(pu.query_attr_select(self.params), ans) + self.assertEqual(pu.query_attr_select(self.params_array), ans_array) + + def test_query_attr_where(self): + """Test pu.query_attr_where""" + + ans = "idx_replace.\"andy\" IS NOT NULL AND " \ + "idx_replace.\"jay_z\" IS NOT NULL AND " \ + "idx_replace.\"jay_z\" <> 0" + + ans_array = "idx_replace.\"_2013_dec\" IS NOT NULL AND " \ + "idx_replace.\"_2014_jan\" IS NOT NULL AND " \ + "idx_replace.\"_2014_feb\" IS NOT NULL" + + self.assertEqual(pu.query_attr_where(self.params), ans) + self.assertEqual(pu.query_attr_where(self.params_array), ans_array) + + def test_knn(self): + """Test knn neighbors constructor""" + + ans = "SELECT i.\"cartodb_id\" As id, " \ + "i.\"andy\"::numeric As attr1, " \ + "i.\"jay_z\"::numeric As attr2, " \ + "(SELECT ARRAY(SELECT j.\"cartodb_id\" " \ + "FROM (SELECT * FROM a_list) As j " \ + "WHERE " \ + "i.\"cartodb_id\" <> j.\"cartodb_id\" AND " \ + "j.\"andy\" IS NOT NULL AND " \ + "j.\"jay_z\" IS NOT NULL AND " \ + "j.\"jay_z\" <> 0 " \ + "ORDER BY " \ + "j.\"the_geom\" <-> i.\"the_geom\" ASC " \ + "LIMIT 321)) As neighbors " \ + "FROM (SELECT * FROM a_list) As i " \ + "WHERE i.\"andy\" IS NOT NULL AND " \ + "i.\"jay_z\" IS NOT NULL AND " \ + "i.\"jay_z\" <> 0 " \ + "ORDER BY i.\"cartodb_id\" ASC;" + + ans_array = "SELECT i.\"cartodb_id\" As id, " \ + "i.\"_2013_dec\"::numeric As attr1, " \ + "i.\"_2014_jan\"::numeric As attr2, " \ + "i.\"_2014_feb\"::numeric As attr3, " \ + "(SELECT ARRAY(SELECT j.\"cartodb_id\" " \ + "FROM (SELECT * FROM a_list) As j " \ + "WHERE i.\"cartodb_id\" <> j.\"cartodb_id\" AND " \ + "j.\"_2013_dec\" IS NOT NULL AND " \ + "j.\"_2014_jan\" IS NOT NULL AND " \ + "j.\"_2014_feb\" IS NOT NULL " \ + "ORDER BY j.\"the_geom\" <-> i.\"the_geom\" ASC " \ + "LIMIT 321)) As neighbors " \ + "FROM (SELECT * FROM a_list) As i " \ + "WHERE i.\"_2013_dec\" IS NOT NULL AND " \ + "i.\"_2014_jan\" IS NOT NULL AND " \ + "i.\"_2014_feb\" IS NOT NULL "\ + "ORDER BY i.\"cartodb_id\" ASC;" + + self.assertEqual(pu.knn(self.params), ans) + self.assertEqual(pu.knn(self.params_array), ans_array) + + def test_queen(self): + """Test queen neighbors constructor""" + + ans = "SELECT i.\"cartodb_id\" As id, " \ + "i.\"andy\"::numeric As attr1, " \ + "i.\"jay_z\"::numeric As attr2, " \ + "(SELECT ARRAY(SELECT j.\"cartodb_id\" " \ + "FROM (SELECT * FROM a_list) As j " \ + "WHERE " \ + "i.\"cartodb_id\" <> j.\"cartodb_id\" AND " \ + "ST_Touches(i.\"the_geom\", " \ + "j.\"the_geom\") AND " \ + "j.\"andy\" IS NOT NULL AND " \ + "j.\"jay_z\" IS NOT NULL AND " \ + "j.\"jay_z\" <> 0)" \ + ") As neighbors " \ + "FROM (SELECT * FROM a_list) As i " \ + "WHERE i.\"andy\" IS NOT NULL AND " \ + "i.\"jay_z\" IS NOT NULL AND " \ + "i.\"jay_z\" <> 0 " \ + "ORDER BY i.\"cartodb_id\" ASC;" + + self.assertEqual(pu.queen(self.params), ans) + + def test_construct_neighbor_query(self): + """Test construct_neighbor_query""" + + # Compare to raw knn query + self.assertEqual(pu.construct_neighbor_query('knn', self.params), + pu.knn(self.params)) + + def test_get_attributes(self): + """Test get_attributes""" + + ## need to add tests + + self.assertEqual(True, True) + + def test_get_weight(self): + """Test get_weight""" + + self.assertEqual(True, True) + + def test_empty_zipped_array(self): + """Test empty_zipped_array""" + ans2 = [(None, None)] + ans4 = [(None, None, None, None)] + self.assertEqual(pu.empty_zipped_array(2), ans2) + self.assertEqual(pu.empty_zipped_array(4), ans4) diff --git a/release/python/0.4.0/crankshaft/test/test_segmentation.py b/release/python/0.4.0/crankshaft/test/test_segmentation.py new file mode 100644 index 0000000..d02e8b1 --- /dev/null +++ b/release/python/0.4.0/crankshaft/test/test_segmentation.py @@ -0,0 +1,64 @@ +import unittest +import numpy as np +from helper import plpy, fixture_file +import crankshaft.segmentation as segmentation +import json + +class SegmentationTest(unittest.TestCase): + """Testing class for Moran's I functions""" + + def setUp(self): + plpy._reset() + + def generate_random_data(self,n_samples,random_state, row_type=False): + x1 = random_state.uniform(size=n_samples) + x2 = random_state.uniform(size=n_samples) + x3 = random_state.randint(0, 4, size=n_samples) + + y = x1+x2*x2+x3 + cartodb_id = range(len(x1)) + + if row_type: + return [ {'features': vals} for vals in zip(x1,x2,x3)], y + else: + return [dict( zip(['x1','x2','x3','target', 'cartodb_id'],[x1,x2,x3,y,cartodb_id]))] + + def test_replace_nan_with_mean(self): + test_array = np.array([1.2, np.nan, 3.2, np.nan, np.nan]) + + def test_create_and_predict_segment(self): + n_samples = 1000 + + random_state_train = np.random.RandomState(13) + random_state_test = np.random.RandomState(134) + training_data = self.generate_random_data(n_samples, random_state_train) + test_data, test_y = self.generate_random_data(n_samples, random_state_test, row_type=True) + + + ids = [{'cartodb_ids': range(len(test_data))}] + rows = [{'x1': 0,'x2':0,'x3':0,'y':0,'cartodb_id':0}] + + plpy._define_result('select \* from \(select \* from training\) a limit 1',rows) + plpy._define_result('.*from \(select \* from training\) as a' ,training_data) + plpy._define_result('select array_agg\(cartodb\_id order by cartodb\_id\) as cartodb_ids from \(.*\) a',ids) + plpy._define_result('.*select \* from test.*' ,test_data) + + model_parameters = {'n_estimators': 1200, + 'max_depth': 3, + 'subsample' : 0.5, + 'learning_rate': 0.01, + 'min_samples_leaf': 1} + + result = segmentation.create_and_predict_segment( + 'select * from training', + 'target', + 'select * from test', + model_parameters) + + prediction = [r[1] for r in result] + + accuracy =np.sqrt(np.mean( np.square( np.array(prediction) - np.array(test_y)))) + + self.assertEqual(len(result),len(test_data)) + self.assertTrue( result[0][2] < 0.01) + self.assertTrue( accuracy < 0.5*np.mean(test_y) ) diff --git a/release/python/0.4.0/crankshaft/test/test_space_time_dynamics.py b/release/python/0.4.0/crankshaft/test/test_space_time_dynamics.py new file mode 100644 index 0000000..54ffc9d --- /dev/null +++ b/release/python/0.4.0/crankshaft/test/test_space_time_dynamics.py @@ -0,0 +1,324 @@ +import unittest +import numpy as np + +import unittest + + +# from mock_plpy import MockPlPy +# plpy = MockPlPy() +# +# import sys +# sys.modules['plpy'] = plpy +from helper import plpy, fixture_file + +import crankshaft.space_time_dynamics as std +from crankshaft import random_seeds +import json + +class SpaceTimeTests(unittest.TestCase): + """Testing class for Markov Functions.""" + + def setUp(self): + plpy._reset() + self.params = {"id_col": "cartodb_id", + "time_cols": ['dec_2013', 'jan_2014', 'feb_2014'], + "subquery": "SELECT * FROM a_list", + "geom_col": "the_geom", + "num_ngbrs": 321} + self.neighbors_data = json.loads(open(fixture_file('neighbors_markov.json')).read()) + self.markov_data = json.loads(open(fixture_file('markov.json')).read()) + + self.time_data = np.array([i * np.ones(10, dtype=float) for i in range(10)]).T + + self.transition_matrix = np.array([ + [[ 0.96341463, 0.0304878 , 0.00609756, 0. , 0. ], + [ 0.06040268, 0.83221477, 0.10738255, 0. , 0. ], + [ 0. , 0.14 , 0.74 , 0.12 , 0. ], + [ 0. , 0.03571429, 0.32142857, 0.57142857, 0.07142857], + [ 0. , 0. , 0. , 0.16666667, 0.83333333]], + [[ 0.79831933, 0.16806723, 0.03361345, 0. , 0. ], + [ 0.0754717 , 0.88207547, 0.04245283, 0. , 0. ], + [ 0.00537634, 0.06989247, 0.8655914 , 0.05913978, 0. ], + [ 0. , 0. , 0.06372549, 0.90196078, 0.03431373], + [ 0. , 0. , 0. , 0.19444444, 0.80555556]], + [[ 0.84693878, 0.15306122, 0. , 0. , 0. ], + [ 0.08133971, 0.78947368, 0.1291866 , 0. , 0. ], + [ 0.00518135, 0.0984456 , 0.79274611, 0.0984456 , 0.00518135], + [ 0. , 0. , 0.09411765, 0.87058824, 0.03529412], + [ 0. , 0. , 0. , 0.10204082, 0.89795918]], + [[ 0.8852459 , 0.09836066, 0. , 0.01639344, 0. ], + [ 0.03875969, 0.81395349, 0.13953488, 0. , 0.00775194], + [ 0.0049505 , 0.09405941, 0.77722772, 0.11881188, 0.0049505 ], + [ 0. , 0.02339181, 0.12865497, 0.75438596, 0.09356725], + [ 0. , 0. , 0. , 0.09661836, 0.90338164]], + [[ 0.33333333, 0.66666667, 0. , 0. , 0. ], + [ 0.0483871 , 0.77419355, 0.16129032, 0.01612903, 0. ], + [ 0.01149425, 0.16091954, 0.74712644, 0.08045977, 0. ], + [ 0. , 0.01036269, 0.06217617, 0.89637306, 0.03108808], + [ 0. , 0. , 0. , 0.02352941, 0.97647059]]] + ) + + def test_spatial_markov(self): + """Test Spatial Markov.""" + data = [ { 'id': d['id'], + 'attr1': d['y1995'], + 'attr2': d['y1996'], + 'attr3': d['y1997'], + 'attr4': d['y1998'], + 'attr5': d['y1999'], + 'attr6': d['y2000'], + 'attr7': d['y2001'], + 'attr8': d['y2002'], + 'attr9': d['y2003'], + 'attr10': d['y2004'], + 'attr11': d['y2005'], + 'attr12': d['y2006'], + 'attr13': d['y2007'], + 'attr14': d['y2008'], + 'attr15': d['y2009'], + 'neighbors': d['neighbors'] } for d in self.neighbors_data] + print(str(data[0])) + plpy._define_result('select', data) + random_seeds.set_random_seeds(1234) + + result = std.spatial_markov_trend('subquery', ['y1995', 'y1996', 'y1997', 'y1998', 'y1999', 'y2000', 'y2001', 'y2002', 'y2003', 'y2004', 'y2005', 'y2006', 'y2007', 'y2008', 'y2009'], 5, 'knn', 5, 0, 'the_geom', 'cartodb_id') + + self.assertTrue(result != None) + result = [(row[0], row[1], row[2], row[3], row[4]) for row in result] + print result[0] + expected = self.markov_data + for ([res_trend, res_up, res_down, res_vol, res_id], + [exp_trend, exp_up, exp_down, exp_vol, exp_id] + ) in zip(result, expected): + self.assertAlmostEqual(res_trend, exp_trend) + + def test_get_time_data(self): + """Test get_time_data""" + data = [ { 'attr1': d['y1995'], + 'attr2': d['y1996'], + 'attr3': d['y1997'], + 'attr4': d['y1998'], + 'attr5': d['y1999'], + 'attr6': d['y2000'], + 'attr7': d['y2001'], + 'attr8': d['y2002'], + 'attr9': d['y2003'], + 'attr10': d['y2004'], + 'attr11': d['y2005'], + 'attr12': d['y2006'], + 'attr13': d['y2007'], + 'attr14': d['y2008'], + 'attr15': d['y2009'] } for d in self.neighbors_data] + + result = std.get_time_data(data, ['y1995', 'y1996', 'y1997', 'y1998', 'y1999', 'y2000', 'y2001', 'y2002', 'y2003', 'y2004', 'y2005', 'y2006', 'y2007', 'y2008', 'y2009']) + + ## expected was prepared from PySAL example: + ### f = ps.open(ps.examples.get_path("usjoin.csv")) + ### pci = np.array([f.by_col[str(y)] for y in range(1995, 2010)]).transpose() + ### rpci = pci / (pci.mean(axis = 0)) + + expected = np.array([[ 0.87654416, 0.863147, 0.85637567, 0.84811668, 0.8446154, 0.83271652 + , 0.83786314, 0.85012593, 0.85509656, 0.86416612, 0.87119375, 0.86302631 + , 0.86148267, 0.86252252, 0.86746356], + [ 0.9188951, 0.91757931, 0.92333258, 0.92517289, 0.92552388, 0.90746978 + , 0.89830489, 0.89431991, 0.88924794, 0.89815176, 0.91832091, 0.91706054 + , 0.90139505, 0.87897455, 0.86216858], + [ 0.82591007, 0.82548596, 0.81989793, 0.81503235, 0.81731522, 0.78964559 + , 0.80584442, 0.8084998, 0.82258551, 0.82668196, 0.82373724, 0.81814804 + , 0.83675961, 0.83574199, 0.84647177], + [ 1.09088176, 1.08537689, 1.08456418, 1.08415404, 1.09898841, 1.14506948 + , 1.12151133, 1.11160697, 1.10888621, 1.11399806, 1.12168029, 1.13164797 + , 1.12958508, 1.11371818, 1.09936775], + [ 1.10731446, 1.11373944, 1.13283638, 1.14472559, 1.15910025, 1.16898201 + , 1.17212488, 1.14752303, 1.11843284, 1.11024964, 1.11943471, 1.11736468 + , 1.10863242, 1.09642516, 1.07762337], + [ 1.42269757, 1.42118434, 1.44273502, 1.43577571, 1.44400684, 1.44184737 + , 1.44782832, 1.41978227, 1.39092208, 1.4059372, 1.40788646, 1.44052766 + , 1.45241216, 1.43306098, 1.4174431 ], + [ 1.13073885, 1.13110513, 1.11074708, 1.13364636, 1.13088149, 1.10888138 + , 1.11856629, 1.13062931, 1.11944984, 1.12446239, 1.11671008, 1.10880034 + , 1.08401709, 1.06959206, 1.07875225], + [ 1.04706124, 1.04516831, 1.04253372, 1.03239987, 1.02072545, 0.99854316 + , 0.9880258, 0.99669587, 0.99327676, 1.01400905, 1.03176742, 1.040511 + , 1.01749645, 0.9936394, 0.98279746], + [ 0.98996986, 1.00143564, 0.99491, 1.00188408, 1.00455845, 0.99127006 + , 0.97925917, 0.9683482, 0.95335147, 0.93694787, 0.94308213, 0.92232874 + , 0.91284091, 0.89689833, 0.88928858], + [ 0.87418391, 0.86416601, 0.84425695, 0.8404494, 0.83903044, 0.8578708 + , 0.86036185, 0.86107306, 0.8500772, 0.86981998, 0.86837929, 0.87204141 + , 0.86633032, 0.84946077, 0.83287146], + [ 1.14196118, 1.14660262, 1.14892712, 1.14909594, 1.14436624, 1.14450183 + , 1.12349752, 1.12596664, 1.12213996, 1.1119989, 1.10257792, 1.10491258 + , 1.11059842, 1.10509795, 1.10020097], + [ 0.97282463, 0.96700147, 0.96252588, 0.9653878, 0.96057687, 0.95831051 + , 0.94480909, 0.94804195, 0.95430286, 0.94103989, 0.92122519, 0.91010201 + , 0.89280392, 0.89298243, 0.89165385], + [ 0.94325468, 0.96436902, 0.96455242, 0.95243009, 0.94117647, 0.9480927 + , 0.93539182, 0.95388718, 0.94597005, 0.96918424, 0.94781281, 0.93466815 + , 0.94281559, 0.96520315, 0.96715441], + [ 0.97478408, 0.98169225, 0.98712809, 0.98474769, 0.98559897, 0.98687073 + , 0.99237486, 0.98209969, 0.9877653, 0.97399471, 0.96910087, 0.98416665 + , 0.98423613, 0.99823861, 0.99545704], + [ 0.85570269, 0.85575915, 0.85986132, 0.85693406, 0.8538012, 0.86191535 + , 0.84981451, 0.85472102, 0.84564835, 0.83998883, 0.83478547, 0.82803648 + , 0.8198736, 0.82265395, 0.8399404 ], + [ 0.87022047, 0.85996258, 0.85961813, 0.85689572, 0.83947136, 0.82785597 + , 0.86008789, 0.86776298, 0.86720209, 0.8676334, 0.89179317, 0.94202108 + , 0.9422231, 0.93902708, 0.94479184], + [ 0.90134907, 0.90407738, 0.90403991, 0.90201769, 0.90399238, 0.90906632 + , 0.92693339, 0.93695966, 0.94242697, 0.94338265, 0.91981796, 0.91108804 + , 0.90543476, 0.91737138, 0.94793657], + [ 1.1977611, 1.18222564, 1.18439158, 1.18267865, 1.19286723, 1.20172869 + , 1.21328691, 1.22624778, 1.22397075, 1.23857042, 1.24419893, 1.23929384 + , 1.23418676, 1.23626739, 1.26754398], + [ 1.24919678, 1.25754773, 1.26991161, 1.28020651, 1.30625667, 1.34790023 + , 1.34399863, 1.32575181, 1.30795492, 1.30544841, 1.30303302, 1.32107766 + , 1.32936244, 1.33001241, 1.33288462], + [ 1.06768004, 1.03799276, 1.03637303, 1.02768449, 1.03296093, 1.05059016 + , 1.03405057, 1.02747623, 1.03162734, 0.9961416, 0.97356208, 0.94241549 + , 0.92754547, 0.92549227, 0.92138102], + [ 1.09475614, 1.11526796, 1.11654299, 1.13103948, 1.13143264, 1.13889622 + , 1.12442212, 1.13367018, 1.13982256, 1.14029944, 1.11979401, 1.10905389 + , 1.10577769, 1.11166825, 1.09985155], + [ 0.76530058, 0.76612841, 0.76542451, 0.76722683, 0.76014284, 0.74480073 + , 0.76098396, 0.76156903, 0.76651952, 0.76533288, 0.78205934, 0.76842416 + , 0.77487118, 0.77768683, 0.78801192], + [ 0.98391336, 0.98075816, 0.98295341, 0.97386015, 0.96913803, 0.97370819 + , 0.96419154, 0.97209861, 0.97441313, 0.96356162, 0.94745352, 0.93965462 + , 0.93069645, 0.94020973, 0.94358232], + [ 0.83561828, 0.82298088, 0.81738502, 0.81748588, 0.80904801, 0.80071489 + , 0.83358256, 0.83451613, 0.85175032, 0.85954307, 0.86790024, 0.87170334 + , 0.87863799, 0.87497981, 0.87888675], + [ 0.98845573, 1.02092428, 0.99665283, 0.99141823, 0.99386619, 0.98733195 + , 0.99644997, 0.99669587, 1.02559097, 1.01116651, 0.99988024, 0.97906749 + , 0.99323123, 1.00204939, 0.99602148], + [ 1.14930913, 1.15241949, 1.14300962, 1.14265542, 1.13984683, 1.08312397 + , 1.05192626, 1.04230892, 1.05577278, 1.08569751, 1.12443486, 1.08891079 + , 1.08603695, 1.05997314, 1.02160943], + [ 1.11368269, 1.1057147, 1.11893431, 1.13778669, 1.1432272, 1.18257029 + , 1.16226243, 1.16009196, 1.14467789, 1.14820235, 1.12386598, 1.12680236 + , 1.12357937, 1.1159258, 1.12570828], + [ 1.30379431, 1.30752186, 1.31206366, 1.31532267, 1.30625667, 1.31210239 + , 1.29989156, 1.29203193, 1.27183516, 1.26830786, 1.2617743, 1.28656675 + , 1.29734097, 1.29390205, 1.29345446], + [ 0.83953719, 0.82701448, 0.82006005, 0.81188876, 0.80294864, 0.78772975 + , 0.82848011, 0.8259679, 0.82435705, 0.83108634, 0.84373784, 0.83891093 + , 0.84349247, 0.85637272, 0.86539395], + [ 1.23450087, 1.2426022, 1.23537935, 1.23581293, 1.24522626, 1.2256767 + , 1.21126648, 1.19377804, 1.18355337, 1.19674434, 1.21536573, 1.23653297 + , 1.27962009, 1.27968392, 1.25907738], + [ 0.9769662, 0.97400719, 0.98035944, 0.97581531, 0.95543282, 0.96480308 + , 0.94686376, 0.93679073, 0.92540049, 0.92988835, 0.93442917, 0.92100464 + , 0.91475304, 0.90249622, 0.9021363 ], + [ 0.84986886, 0.8986851, 0.84295997, 0.87280534, 0.85659368, 0.88937573 + , 0.894401, 0.90448993, 0.95495898, 0.92698333, 0.94745352, 0.92562488 + , 0.96635366, 1.02520312, 1.0394296 ], + [ 1.01922808, 1.00258203, 1.00974428, 1.00303417, 0.99765073, 1.00759019 + , 0.99192968, 0.99747298, 0.99550759, 0.97583768, 0.9610168, 0.94779638 + , 0.93759089, 0.93353431, 0.94121705], + [ 0.86367411, 0.85558932, 0.85544346, 0.85103025, 0.84336613, 0.83434854 + , 0.85813595, 0.84667961, 0.84374558, 0.85951183, 0.87194227, 0.89455097 + , 0.88283929, 0.90349491, 0.90600675], + [ 1.00947534, 1.00411055, 1.00698819, 0.99513687, 0.99291086, 1.00581626 + , 0.98850522, 0.99291168, 0.98983209, 0.97511924, 0.96134615, 0.96382634 + , 0.95011401, 0.9434686, 0.94637765], + [ 1.05712571, 1.05459419, 1.05753012, 1.04880786, 1.05103857, 1.04800023 + , 1.03024941, 1.04200483, 1.0402554, 1.03296979, 1.02191682, 1.02476275 + , 1.02347523, 1.02517684, 1.04359571], + [ 1.07084189, 1.06669497, 1.07937623, 1.07387988, 1.0794043, 1.0531801 + , 1.07452771, 1.09383478, 1.1052447, 1.10322136, 1.09167939, 1.08772756 + , 1.08859544, 1.09177338, 1.1096083 ], + [ 0.86719222, 0.86628896, 0.86675156, 0.86425632, 0.86511809, 0.86287327 + , 0.85169796, 0.85411285, 0.84886336, 0.84517414, 0.84843858, 0.84488343 + , 0.83374329, 0.82812044, 0.82878599], + [ 0.88389211, 0.92288667, 0.90282398, 0.91229186, 0.92023286, 0.92652175 + , 0.94278865, 0.93682452, 0.98655146, 0.992237, 0.9798497, 0.93869677 + , 0.96947771, 1.00362626, 0.98102351], + [ 0.97082064, 0.95320233, 0.94534081, 0.94215593, 0.93967, 0.93092109 + , 0.92662519, 0.93412152, 0.93501274, 0.92879506, 0.92110542, 0.91035556 + , 0.90430364, 0.89994694, 0.90073864], + [ 0.95861858, 0.95774543, 0.98254811, 0.98919472, 0.98684824, 0.98882205 + , 0.97662234, 0.95601578, 0.94905385, 0.94934888, 0.97152609, 0.97163004 + , 0.9700702, 0.97158948, 0.95884908], + [ 0.83980439, 0.84726737, 0.85747, 0.85467221, 0.8556751, 0.84818516 + , 0.85265681, 0.84502402, 0.82645665, 0.81743586, 0.83550406, 0.83338919 + , 0.83511679, 0.82136617, 0.80921874], + [ 0.95118156, 0.9466212, 0.94688098, 0.9508583, 0.9512441, 0.95440787 + , 0.96364363, 0.96804412, 0.97136214, 0.97583768, 0.95571724, 0.96895368 + , 0.97001634, 0.97082733, 0.98782366], + [ 1.08910044, 1.08248968, 1.08492895, 1.08656923, 1.09454249, 1.10558188 + , 1.1214086, 1.12292577, 1.13021031, 1.13342735, 1.14686068, 1.14502975 + , 1.14474747, 1.14084037, 1.16142926], + [ 1.06336033, 1.07365823, 1.08691496, 1.09764846, 1.11669863, 1.11856702 + , 1.09764283, 1.08815849, 1.08044313, 1.09278827, 1.07003204, 1.08398066 + , 1.09831768, 1.09298232, 1.09176125], + [ 0.79772065, 0.78829196, 0.78581151, 0.77615922, 0.77035744, 0.77751194 + , 0.79902974, 0.81437881, 0.80788828, 0.79603865, 0.78966436, 0.79949807 + , 0.80172182, 0.82168155, 0.85587911], + [ 1.0052447, 1.00007696, 1.00475899, 1.00613942, 1.00639561, 1.00162979 + , 0.99860739, 1.00814981, 1.00574316, 0.99030032, 0.97682565, 0.97292596 + , 0.96519561, 0.96173403, 0.95890284], + [ 0.95808419, 0.9382568, 0.9654441, 0.95561201, 0.96987289, 0.96608031 + , 0.99727185, 1.00781194, 1.03484236, 1.05333619, 1.0983263, 1.1704974 + , 1.17025154, 1.18730553, 1.14242645]]) + + self.assertTrue(np.allclose(result, expected)) + self.assertTrue(type(result) == type(expected)) + self.assertTrue(result.shape == expected.shape) + + def test_rebin_data(self): + """Test rebin_data""" + ## sample in double the time (even case since 10 % 2 = 0): + ## (0+1)/2, (2+3)/2, (4+5)/2, (6+7)/2, (8+9)/2 + ## = 0.5, 2.5, 4.5, 6.5, 8.5 + ans_even = np.array([(i + 0.5) * np.ones(10, dtype=float) + for i in range(0, 10, 2)]).T + + self.assertTrue(np.array_equal(std.rebin_data(self.time_data, 2), ans_even)) + + ## sample in triple the time (uneven since 10 % 3 = 1): + ## (0+1+2)/3, (3+4+5)/3, (6+7+8)/3, (9)/1 + ## = 1, 4, 7, 9 + ans_odd = np.array([i * np.ones(10, dtype=float) + for i in (1, 4, 7, 9)]).T + self.assertTrue(np.array_equal(std.rebin_data(self.time_data, 3), ans_odd)) + + def test_get_prob_dist(self): + """Test get_prob_dist""" + lag_indices = np.array([1, 2, 3, 4]) + unit_indices = np.array([1, 3, 2, 4]) + answer = np.array([ + [ 0.0754717 , 0.88207547, 0.04245283, 0. , 0. ], + [ 0. , 0. , 0.09411765, 0.87058824, 0.03529412], + [ 0.0049505 , 0.09405941, 0.77722772, 0.11881188, 0.0049505 ], + [ 0. , 0. , 0. , 0.02352941, 0.97647059] + ]) + result = std.get_prob_dist(self.transition_matrix, lag_indices, unit_indices) + + self.assertTrue(np.array_equal(result, answer)) + + def test_get_prob_stats(self): + """Test get_prob_stats""" + + probs = np.array([ + [ 0.0754717 , 0.88207547, 0.04245283, 0. , 0. ], + [ 0. , 0. , 0.09411765, 0.87058824, 0.03529412], + [ 0.0049505 , 0.09405941, 0.77722772, 0.11881188, 0.0049505 ], + [ 0. , 0. , 0. , 0.02352941, 0.97647059] + ]) + unit_indices = np.array([1, 3, 2, 4]) + answer_up = np.array([0.04245283, 0.03529412, 0.12376238, 0.]) + answer_down = np.array([0.0754717, 0.09411765, 0.0990099, 0.02352941]) + answer_trend = np.array([-0.03301887 / 0.88207547, -0.05882353 / 0.87058824, 0.02475248 / 0.77722772, -0.02352941 / 0.97647059]) + answer_volatility = np.array([ 0.34221495, 0.33705421, 0.29226542, 0.38834223]) + + result = std.get_prob_stats(probs, unit_indices) + result_up = result[0] + result_down = result[1] + result_trend = result[2] + result_volatility = result[3] + + self.assertTrue(np.allclose(result_up, answer_up)) + self.assertTrue(np.allclose(result_down, answer_down)) + self.assertTrue(np.allclose(result_trend, answer_trend)) + self.assertTrue(np.allclose(result_volatility, answer_volatility)) diff --git a/src/pg/crankshaft.control b/src/pg/crankshaft.control index bf7cf0f..7df077c 100644 --- a/src/pg/crankshaft.control +++ b/src/pg/crankshaft.control @@ -1,5 +1,5 @@ comment = 'CartoDB Spatial Analysis extension' -default_version = '0.3.1' +default_version = '0.4.0' requires = 'plpythonu, postgis' superuser = true schema = cdb_crankshaft diff --git a/src/pg/sql/13_PIA.sql b/src/pg/sql/13_PIA.sql new file mode 100644 index 0000000..d9a224d --- /dev/null +++ b/src/pg/sql/13_PIA.sql @@ -0,0 +1,123 @@ +-- Based on: +-- https://github.com/mapbox/polylabel/blob/master/index.js +-- https://sites.google.com/site/polesofinaccessibility/ +-- Requires: https://github.com/CartoDB/cartodb-postgresql + +-- Based on: +-- https://github.com/mapbox/polylabel/blob/master/index.js +-- https://sites.google.com/site/polesofinaccessibility/ +-- Requires: https://github.com/CartoDB/cartodb-postgresql + +CREATE OR REPLACE FUNCTION CDB_PIA( + IN polygon geometry, + IN tolerance numeric DEFAULT 1.0 + ) +RETURNS geometry AS $$ +DECLARE + env geometry[]; + cells geometry[]; + cell geometry; + best_c geometry; + best_d numeric; + test_d numeric; + test_mx numeric; + test_h numeric; + test_cells geometry[]; + width numeric; + height numeric; + h numeric; + i integer; + n integer; + sqr numeric; + p geometry; +BEGIN + sqr := |/2; + polygon := ST_Transform(polygon, 3857); + + -- grid #0 cell size + height := ST_YMax(polygon) - ST_YMin(polygon); + width := ST_XMax(polygon) - ST_XMin(polygon); + h := 0.5*LEAST(height, width); + + -- grid #0 + with c1 as( + SELECT cdb_crankshaft.CDB_RectangleGrid(polygon, h, h) as c + ) + SELECT array_agg(c) INTO cells FROM c1; + + -- 1st guess: centroid + best_d := cdb_crankshaft._Signed_Dist(polygon, ST_Centroid(Polygon)); + + -- looping the loop + n := array_length(cells,1); + i := 1; + LOOP + + EXIT WHEN i > n; + + cell := cells[i]; + i := i+1; + + -- cell side size, it's square + test_h := ST_XMax(cell) - ST_XMin(cell) ; + + -- check distance + test_d := cdb_crankshaft._Signed_Dist(polygon, ST_Centroid(cell)); + IF test_d > best_d THEN + best_d := test_d; + best_c := cells[i]; + END IF; + + -- longest distance within the cell + test_mx := test_d + (test_h/2 * sqr); + + -- if the cell has no chance to contains the desired point, continue + CONTINUE WHEN test_mx - best_d <= tolerance; + + -- resample the cell + with c1 as( + SELECT cdb_crankshaft.CDB_RectangleGrid(cell, test_h/2, test_h/2) as c + ) + SELECT array_agg(c) INTO test_cells FROM c1; + + -- concat the new cells to the former array + cells := cells || test_cells; + + -- prepare next iteration + n := array_length(cells,1); + + END LOOP; + + RETURN ST_transform(ST_Centroid(best_c), 4326); + +END; +$$ language plpgsql IMMUTABLE; + + +-- signed distance point to polygon with holes +-- negative is the point is out the polygon +CREATE OR REPLACE FUNCTION _Signed_Dist( + IN polygon geometry, + IN point geometry + ) +RETURNS numeric AS $$ +DECLARE + i integer; + within integer; + holes integer; + dist numeric; +BEGIN + dist := 1e999; + SELECT LEAST(dist, ST_distance(point, ST_ExteriorRing(polygon))::numeric) INTO dist; + SELECT CASE WHEN ST_Within(point,polygon) THEN 1 ELSE -1 END INTO within; + SELECT ST_NumInteriorRings(polygon) INTO holes; + IF holes > 0 THEN + FOR i IN 1..holes + LOOP + SELECT LEAST(dist, ST_distance(point, ST_InteriorRingN(polygon, i))::numeric) INTO dist; + END LOOP; + END IF; + dist := dist * within::numeric; + RETURN dist; +END; +$$ language plpgsql IMMUTABLE; diff --git a/src/pg/sql/14_densify.sql b/src/pg/sql/14_densify.sql new file mode 100644 index 0000000..47a200e --- /dev/null +++ b/src/pg/sql/14_densify.sql @@ -0,0 +1,67 @@ +-- +-- Iterative densification of a set of points using Delaunay triangulation +-- the new points have as assigned value the average value of the 3 vertex (centroid) +-- +-- @param geomin - array of geometries (points) +-- +-- @param colin - array of numeric values in that points +-- +-- @param iterations - integer, number of iterations +-- +-- +-- Returns: TABLE(geomout geometry, colout numeric) +-- +-- +CREATE OR REPLACE FUNCTION CDB_Densify( + IN geomin geometry[], + IN colin numeric[], + IN iterations integer + ) +RETURNS TABLE(geomout geometry, colout numeric) AS $$ +DECLARE + geotemp geometry[]; + coltemp numeric[]; + i integer; + gs geometry[]; + g geometry; + vertex geometry[]; + va numeric; + vb numeric; + vc numeric; + center geometry; + centerval numeric; + tmp integer; +BEGIN + geotemp := geomin; + coltemp := colin; + FOR i IN 1..iterations + LOOP + -- generate TIN + WITH a as (SELECT unnest(geotemp) AS e), + b as (SELECT ST_DelaunayTriangles(ST_Collect(a.e),0.001, 0) AS t FROM a), + c as (SELECT (ST_Dump(t)).geom AS v FROM b) + SELECT array_agg(v) INTO gs FROM c; + -- loop cells + FOREACH g IN ARRAY gs + LOOP + -- append centroid + SELECT ST_Centroid(g) INTO center; + geotemp := array_append(geotemp, center); + -- retrieve the value of each vertex + WITH a AS (SELECT (ST_DumpPoints(g)).geom AS v) + SELECT array_agg(v) INTO vertex FROM a; + WITH a AS(SELECT unnest(geotemp) as geo, unnest(coltemp) as c) + SELECT c INTO va FROM a WHERE ST_Equals(geo, vertex[1]); + WITH a AS(SELECT unnest(geotemp) as geo, unnest(coltemp) as c) + SELECT c INTO vb FROM a WHERE ST_Equals(geo, vertex[2]); + WITH a AS(SELECT unnest(geotemp) as geo, unnest(coltemp) as c) + SELECT c INTO vc FROM a WHERE ST_Equals(geo, vertex[3]); + -- calc the value at the center + centerval := (va + vb + vc) / 3; + -- append the value + coltemp := array_append(coltemp, centerval); + END LOOP; + END LOOP; + RETURN QUERY SELECT unnest(geotemp ) as geomout, unnest(coltemp ) as colout; +END; +$$ language plpgsql IMMUTABLE; diff --git a/src/pg/sql/15_tinmap.sql b/src/pg/sql/15_tinmap.sql new file mode 100644 index 0000000..493c9cf --- /dev/null +++ b/src/pg/sql/15_tinmap.sql @@ -0,0 +1,43 @@ +CREATE OR REPLACE FUNCTION CDB_TINmap( + IN geomin geometry[], + IN colin numeric[], + IN iterations integer + ) +RETURNS TABLE(geomout geometry, colout numeric) AS $$ +DECLARE + p geometry[]; + vals numeric[]; + gs geometry[]; + g geometry; + vertex geometry[]; + centerval numeric; + va numeric; + vb numeric; + vc numeric; + coltemp numeric[]; +BEGIN + SELECT array_agg(dens.geomout), array_agg(dens.colout) INTO p, vals FROM cdb_crankshaft.CDB_Densify(geomin, colin, iterations) dens; + WITH a as (SELECT unnest(p) AS e), + b as (SELECT ST_DelaunayTriangles(ST_Collect(a.e),0.001, 0) AS t FROM a), + c as (SELECT (ST_Dump(t)).geom AS v FROM b) + SELECT array_agg(v) INTO gs FROM c; + FOREACH g IN ARRAY gs + LOOP + -- retrieve the vertex of each triangle + WITH a AS (SELECT (ST_DumpPoints(g)).geom AS v) + SELECT array_agg(v) INTO vertex FROM a; + -- retrieve the value of each vertex + WITH a AS(SELECT unnest(p) as geo, unnest(vals) as c) + SELECT c INTO va FROM a WHERE ST_Equals(geo, vertex[1]); + WITH a AS(SELECT unnest(p) as geo, unnest(vals) as c) + SELECT c INTO vb FROM a WHERE ST_Equals(geo, vertex[2]); + WITH a AS(SELECT unnest(p) as geo, unnest(vals) as c) + SELECT c INTO vc FROM a WHERE ST_Equals(geo, vertex[3]); + -- calc the value at the center + centerval := (va + vb + vc) / 3; + -- append the value + coltemp := array_append(coltemp, centerval); + END LOOP; + RETURN QUERY SELECT unnest(gs) as geomout, unnest(coltemp ) as colout; +END; +$$ language plpgsql IMMUTABLE; diff --git a/src/pg/test/expected/13_pia_test.out b/src/pg/test/expected/13_pia_test.out new file mode 100644 index 0000000..2367e20 --- /dev/null +++ b/src/pg/test/expected/13_pia_test.out @@ -0,0 +1,7 @@ +SET client_min_messages TO WARNING; +\set ECHO none + st_astext +------------------------------------------- + POINT(-3.67484492582767 40.4395084885993) +(1 row) + diff --git a/src/pg/test/expected/14_densify_test.out b/src/pg/test/expected/14_densify_test.out new file mode 100644 index 0000000..549652b --- /dev/null +++ b/src/pg/test/expected/14_densify_test.out @@ -0,0 +1,50 @@ +SET client_min_messages TO WARNING; +\set ECHO none + cdb_densify +----------------------------------------------------------------- + (01010000001361C3D32B6501403255302AA9B34440,7.0) + (01010000002497FF907EFB0040F085C954C1B04440,8.0) + (0101000000A167B3EA73350140E4141DC9E5AF4440,1.0) + (010100000062A1D634EF38014014D044D8F0B44440,2.0) + (010100000052B81E85EB510140EEEBC03923B24440,3.0) + (0101000000C286A757CA3201409D8026C286AF4440,5.0) + (01010000007DD0B359F5390140F38E537424AF4440,6.0) + (0101000000D237691A140D0140014EEFE2FDB44440,4.0) + (01010000003312B4DCAC14014047F8F1AAE1B14440,4.3333333333333333) + (010100000048C0FBBD27290140A9BBC5D646B34440,2.3333333333333333) + (01010000001DEBE2361A400140F79A0B4953B24440,2.0000000000000000) + (010100000098933D2F02500140115B676994B34440,4.0000000000000000) + (01010000004BA3DC90595001405C456C9DA5B14440,5.3333333333333333) + (0101000000D1FA8198714001404285107D64B04440,3.3333333333333333) + (01010000004AEA043411360140D2B687AA85AF4440,4.0000000000000000) + (0101000000CCA4736BBF2201402B8716D9CEAF4440,6.3333333333333333) + (0101000000832C1EF13E2101402609AF4A0FB04440,4.6666666666666667) + (010100000063A009D8BF090140BEEE38F68AB24440,5.4444444444444444) + (010100000019AE5D3CF8180140A5008D2162B34440,3.5555555555555555) + (01010000007E88BE590E250140EB9DA83067B44440,2.7777777777777778) + (0101000000C05105B65D3B014044A2D0B2EEB34440,2.7777777777777778) + (010100000005329D125F4F01401C8049790FB44440,4.3333333333333333) + (010100000054E45F2DB3570140BBDE724420B34440,4.6666666666666667) + (0101000000E53EEA4DD05701407FD7C9557BB24440,5.1111111111111111) + (01010000004A9CC694D34F01402B63A5BE7BB14440,6.1111111111111111) + (0101000000DD24068195430140317345DA64B04440,4.8888888888888889) + (010100000033E768B7D23A014002994E89AFAF4440,4.4444444444444444) + (010100000083C0CAA145360140CAEC55A065AF4440,5.0000000000000000) + (010100000004549A09D52F01403E3230057EAF4440,5.7777777777777778) + (010100000024040D72661D0140B0DEBBE0E6AF4440,6.7777777777777778) + (01010000007CCD85A42915014017B22F2835B04440,6.3333333333333333) + (0101000000F5F145CA781001401F2DCE18E6B04440,5.6666666666666667) + (0101000000F10DE756572701402134E4146CB14440,3.6666666666666667) + (01010000008894DB45FA290140F8C4EB987EB24440,2.8888888888888889) + (0101000000AABF5E61C13D0140E6E512830FB34440,2.7777777777777778) + (0101000000581215F9574B0140FDF5BB4EAEB24440,3.0000000000000000) + (0101000000EA6C9F19754B0140C0EE126009B24440,3.4444444444444444) + (01010000001383C0CAA145014088CC827674B14440,3.5555555555555555) + (0101000000D0B02B40EE350140C90D9905EDB04440,3.3333333333333333) + (010100000051DA1B7C613201406F36F4DA1DB04440,3.0000000000000000) + (0101000000EA6E133D52390140FD1AE7FAEFAF4440,2.7777777777777778) + (01010000003A487527C5340140C76EEE11A6AF4440,3.3333333333333333) + (0101000000BADB448F542E01403AB4C876BEAF4440,4.1111111111111111) + (0101000000FB12176D7B280140BDE1A0F9EBAF4440,4.0000000000000000) +(44 rows) + diff --git a/src/pg/test/expected/15_tinmap_test.out b/src/pg/test/expected/15_tinmap_test.out new file mode 100644 index 0000000..af0221f --- /dev/null +++ b/src/pg/test/expected/15_tinmap_test.out @@ -0,0 +1,83 @@ +SET client_min_messages TO WARNING; +\set ECHO none + cdb_tinmap +--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- + (01030000000100000004000000D237691A140D0140014EEFE2FDB444402497FF907EFB0040F085C954C1B0444063A009D8BF090140BEEE38F68AB24440D237691A140D0140014EEFE2FDB44440,5.8148148148148148) + (01030000000100000004000000D237691A140D0140014EEFE2FDB4444063A009D8BF090140BEEE38F68AB2444019AE5D3CF8180140A5008D2162B34440D237691A140D0140014EEFE2FDB44440,4.3333333333333333) + (01030000000100000004000000D237691A140D0140014EEFE2FDB4444019AE5D3CF8180140A5008D2162B344407E88BE590E250140EB9DA83067B44440D237691A140D0140014EEFE2FDB44440,3.4444444444444444) + 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st_geomfromtext('POLYGON((-432540.453078056 4949775.20452642,-432329.947920966 4951361.232584,-431245.028163694 4952223.31516671,-429131.071033529 4951768.00415574,-424622.07505895 4952843.13503987,-423688.327170174 4953499.20752423,-424086.294349759 4954968.38274191,-423068.388925945 4954378.63345336,-423387.653225542 4953355.67417084,-420594.869840519 4953781.00230592,-416026.095299382 4951484.06849063,-412483.018546414 4951024.5410983,-410490.399661215 4954502.24032205,-408186.197521284 4956398.91417441,-407627.262358013 4959300.94633864,-406948.770061627 4959874.85407739,-404949.583326472 4959047.74518163,-402570.908447199 4953743.46829807,-400971.358683991 4952193.11680804,-403533.488084088 4949649.89857885,-406335.177028373 4950193.19571096,-407790.456731515 4952391.46015616,-412060.672398345 4950381.2389307,-410716.93482498 4949156.7509561,-408464.162289794 4943912.8940387,-409350.599394983 4942819.84896006,-408087.791091424 4942451.6711778,-407274.045613725 4940572.4807777,-404446.196589102 4939976.71501489,-402422.964843936 4940450.3670813,-401010.654464241 4939054.8061663,-397647.247369412 4940679.80737878,-395658.413346901 4940528.84765185,-395536.852462953 4938829.79565997,-394268.923462818 4938003.7277717,-393388.720249116 4934757.80596815,-392393.301362444 4934326.71675815,-392573.527618037 4932323.40974412,-393464.640141837 4931903.10653605,-393085.597275686 4931094.7353605,-398426.261165985 4929156.87541607,-398261.174361137 4926238.00816416,-394045.059966834 4925765.18668498,-392982.960705174 4926391.81893628,-393090.272694301 4927176.84692181,-391648.240010564 4924626.06386961,-391889.914625075 4923086.14787613,-394345.177314013 4923235.086036,-395550.878718795 4917812.79243978,-399009.463978251 4912927.7157945,-398948.794855767 4911941.91010796,-398092.636652078 4911806.57392519,-401991.601817112 4911722.9204501,-406225.972607907 4914505.47286319,-411104.994569885 4912569.26941163,-412925.513522316 4913030.3608866,-414630.148884835 4914436.69169949,-414207.691417276 4919205.78028405,-418306.141109809 4917994.9580478,-424184.700779621 4918938.12432889,-426816.961458921 4923664.37379373,-420956.324227126 4923381.98014807,-420186.661267781 4924286.48693378,-420943.411166194 4926812.76394433,-419779.45457046 4928527.43466337,-419768.767899344 4930681.94459216,-421911.668097113 4930432.40620397,-423482.386112205 4933451.28047252,-427272.814773717 4934151.56473242,-427144.908678797 4939731.77191996,-428982.125554848 4940522.84445172,-428986.133056516 4942437.17281266,-431237.792396792 4947309.68284815,-432476.889648814 4947791.74800037,-432540.453078056 4949775.20452642))', 3857) as g +) +SELECT st_astext(cdb_crankshaft.CDB_PIA(g)) from a; diff --git a/src/pg/test/sql/14_densify_test.sql b/src/pg/test/sql/14_densify_test.sql new file mode 100644 index 0000000..9b716f8 --- /dev/null +++ b/src/pg/test/sql/14_densify_test.sql @@ -0,0 +1,9 @@ +SET client_min_messages TO WARNING; +\set ECHO none + +with data as ( + select + ARRAY[7.0,8.0,1.0,2.0,3.0,5.0,6.0,4.0] as colin, + ARRAY[ST_GeomFromText('POINT(2.1744 41.4036)'),ST_GeomFromText('POINT(2.1228 41.3809)'),ST_GeomFromText('POINT(2.1511 41.3742)'),ST_GeomFromText('POINT(2.1528 41.4136)'),ST_GeomFromText('POINT(2.165 41.3917)'),ST_GeomFromText('POINT(2.1498 41.3713)'),ST_GeomFromText('POINT(2.1533 41.3683)'),ST_GeomFromText('POINT(2.131386 41.413998)')] as geomin +) +select cdb_crankshaft.CDB_Densify(geomin, colin, 2) from data; diff --git a/src/pg/test/sql/15_tinmap_test.sql b/src/pg/test/sql/15_tinmap_test.sql new file mode 100644 index 0000000..dcb7fe4 --- /dev/null +++ b/src/pg/test/sql/15_tinmap_test.sql @@ -0,0 +1,9 @@ +SET client_min_messages TO WARNING; +\set ECHO none + +with data as ( + select + ARRAY[7.0,8.0,1.0,2.0,3.0,5.0,6.0,4.0] as colin, + ARRAY[ST_GeomFromText('POINT(2.1744 41.4036)'),ST_GeomFromText('POINT(2.1228 41.3809)'),ST_GeomFromText('POINT(2.1511 41.3742)'),ST_GeomFromText('POINT(2.1528 41.4136)'),ST_GeomFromText('POINT(2.165 41.3917)'),ST_GeomFromText('POINT(2.1498 41.3713)'),ST_GeomFromText('POINT(2.1533 41.3683)'),ST_GeomFromText('POINT(2.131386 41.413998)')] as geomin +) +select cdb_crankshaft.CDB_TINmap(geomin, colin, 2) from data;