Open
Description
Pandas version checks
- I have checked that the issue still exists on the latest versions of the docs on
mainhere
Location of the documentation
Documentation problem
>>> df = pd.DataFrame({'A' : ['foo', 'bar', 'foo', 'bar',
... 'foo', 'bar'],
... 'B' : ['one', 'one', 'two', 'three',
... 'two', 'two'],
... 'C' : [1, 5, 5, 2, 5, 5],
... 'D' : [2.0, 5., 8., 1., 2., 9.]})
>>> grouped = df.groupby('A')[['C', 'D']]
>>> grouped.transform(lambda x: (x - x.mean()) / x.std())
C D
0 -1.154701 -0.577350
1 0.577350 0.000000
2 0.577350 1.154701
3 -1.154701 -1.000000
4 0.577350 -0.577350
5 0.577350 1.000000
This is the current example in SeriesGroupBy.tranform
Suggested fix for documentation
It should be changed with
grouped: pd.Series=df.groupby('A')[['C', 'D']]
just to make it clear it becomes hard for first timers