Github user fmcquillan99 commented on the issue:
https://github.com/apache/madlib/pull/291
In vec2cols,
```
SELECT madlib.vec2cols(
'golf', -- source table
'vec2cols_result', -- output table
'clouds_airquality', -- column with array entries to split
ARRAY['clouds', 'air_quality'], -- feature names
'"OUTLOOK", id' -- columns to keep from source table
);
```
results in
```
clouds | air_quality | OUTLOOK | id
--------+-------------+----------+----
none | unhealthy | sunny | 1
none | moderate | sunny | 2
low | moderate | overcast | 3
low | moderate | rain | 4
medium | good | rain | 5
low | unhealthy | rain | 6
medium | moderate | overcast | 7
high | unhealthy | sunny | 8
high | good | sunny | 9
medium | good | rain | 10
none | good | sunny | 11
medium | moderate | overcast | 12
medium | moderate | overcast | 13
low | unhealthy | rain | 14
(14 rows)
```
but the split columns `clouds` and `air_quality` should
be the right side of the table. This will make
it consistent with the way cols2vec works.
---
