pandas.core.resample.Resampler.transform

Resampler.transform(arg, *args, **kwargs)

Call function producing a like-indexed Series on each group.

Return a Series with the transformed values.

Parameters

argfunction

To apply to each group. Should return a Series with the same index.

Returns

Series

Examples

>>> s = pd.Series([1, 2],
...               index=pd.date_range('20180101',
...                                   periods=2,
...                                   freq='1h'))
>>> s
2018-01-01 00:00:00    1
2018-01-01 01:00:00    2
Freq: H, dtype: int64

>>> resampled = s.resample('15min')
>>> resampled.transform(lambda x: (x - x.mean()) / x.std())
2018-01-01 00:00:00   NaN
2018-01-01 01:00:00   NaN
Freq: H, dtype: float64