Github user fmcquillan99 commented on the issue:
https://github.com/apache/madlib/pull/223
Regarding (2) and (3) above, looks like it does not fail with `'red:7,
blue:7'` but the MADlib convention is 'red=7, blue=7' so need to change to use
`=`.
(4)
Seems to take only the 1st param in
```
DROP TABLE IF EXISTS output_table;
SELECT madlib.balance_sample(
'flags', -- Source table
'output_table', -- Output table
'mainhue', -- Class column
'red:7, blue:7'); -- Want 7 reds and 7
blues`
SELECT * FROM output_table ORDER BY mainhue, name;
```
which produces 7 red but leaves 5 blue (should be 7)
```
id | name | landmass | zone | area | population | language |
colours | mainhue
----+-------------+----------+------+------+------------+----------+---------+---------
1 | Argentina | 2 | 3 | 2777 | 28 | 2 |
2 | blue
2 | Australia | 6 | 2 | 7690 | 15 | 1 |
3 | blue
8 | Greece | 3 | 1 | 132 | 10 | 6 |
2 | blue
9 | Guatemala | 1 | 4 | 109 | 8 | 2 |
2 | blue
17 | Sweden | 3 | 1 | 450 | 8 | 6 |
2 | blue
4 | Brazil | 2 | 3 | 8512 | 119 | 6 |
4 | green
11 | Jamaica | 1 | 4 | 11 | 2 | 1 |
3 | green
13 | Mexico | 1 | 4 | 1973 | 77 | 2 |
4 | green
3 | Austria | 3 | 1 | 84 | 8 | 4 |
2 | red
5 | Canada | 1 | 4 | 9976 | 24 | 1 |
2 | red
7 | Denmark | 3 | 1 | 43 | 5 | 6 |
2 | red
12 | Luxembourg | 3 | 1 | 3 | 0 | 4 |
3 | red
15 | Portugal | 3 | 4 | 92 | 10 | 6 |
5 | red
18 | Switzerland | 3 | 1 | 41 | 6 | 4 |
2 | red
19 | UK | 3 | 4 | 245 | 56 | 1 |
3 | red
10 | Ireland | 3 | 4 | 70 | 3 | 1 |
3 | white
20 | USA | 1 | 4 | 9363 | 231 | 1 |
3 | white
(17 rows)
```
---
