cartodb4/cartodb-postgresql
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

updating function

Browse Source
This commit is contained in:
Andy Eschbacher 2015-06-08 15:02:39 -04:00
parent 9cb1fe30d8
commit 8e2d86414f
1 changed files with 4 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
scripts-available/CDB_DistType.sql
View File

@ -10,8 +10,7 @@
-- 1. width_bucket/histograms: http://tapoueh.org/blog/2014/02/21-PostgreSQL-histogram
-- 2. R implementation: https://github.com/cran/agrmt
CREATE OR REPLACE FUNCTION CDB_ClassTest ( in_array NUMERIC[] ) RETURNS text as $$
CREATE OR REPLACE FUNCTION CDB_DistType ( in_array NUMERIC[] ) RETURNS text as $$
DECLARE
element_count INT4;
minv numeric;
@ -27,7 +26,7 @@ DECLARE
BEGIN
SELECT min(e), max(e), count(e) INTO minv, maxv, element_count FROM ( SELECT unnest(in_array) e ) x;
IF abs(maxv - minv) < 1e-7 THEN -- if max and min are nearly equal, call if 'F'
IF abs(maxv - minv) < 1e-7 THEN -- if max and min are nearly equal, call if 'F' (make relative to maxv?)
signature = 'F';
ELSE
-- Calculate bins and count in bins
@ -39,7 +38,7 @@ BEGIN
WHERE e is not null
),
hist as (
SELECT width_bucket(e, s.minv, s.maxv, 6) bucket,
SELECT width_bucket(e, s.minv, s.maxv, 7) bucket,
count(*) freq
FROM (SELECT unnest($1) e) x, stats s
WHERE e is not null