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# pandas.core.resample.Resampler.transform

final 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