SeriesGroupBy.skew(axis=_NoDefault.no_default, skipna=True, numeric_only=False, **kwargs)[source]#

Return unbiased skew within groups.

Normalized by N-1.

axis{0 or ‘index’, 1 or ‘columns’, None}, default 0

Axis for the function to be applied on. This parameter is only for compatibility with DataFrame and is unused.

skipnabool, default True

Exclude NA/null values when computing the result.

numeric_onlybool, default False

Include only float, int, boolean columns. Not implemented for Series.


Additional keyword arguments to be passed to the function.


See also


Return unbiased skew over requested axis.


>>> ser = pd.Series([390., 350., 357., np.nan, 22., 20., 30.],
...                 index=['Falcon', 'Falcon', 'Falcon', 'Falcon',
...                        'Parrot', 'Parrot', 'Parrot'],
...                 name="Max Speed")
>>> ser
Falcon    390.0
Falcon    350.0
Falcon    357.0
Falcon      NaN
Parrot     22.0
Parrot     20.0
Parrot     30.0
Name: Max Speed, dtype: float64
>>> ser.groupby(level=0).skew()
Falcon    1.525174
Parrot    1.457863
Name: Max Speed, dtype: float64
>>> ser.groupby(level=0).skew(skipna=False)
Falcon         NaN
Parrot    1.457863
Name: Max Speed, dtype: float64