pandas.core.window.Expanding.count

Expanding.count(**kwargs)

The expanding count of any non-NaN observations inside the window.

Returns:

Series or DataFrame

Returned object type is determined by the caller of the expanding calculation.

See also

pandas.Series.expanding

Calling object with Series data

pandas.DataFrame.expanding

Calling object with DataFrames

pandas.DataFrame.count

Count of the full DataFrame

Examples

>>> s = pd.Series([2, 3, np.nan, 10])
>>> s.rolling(2).count()
0    1.0
1    2.0
2    1.0
3    1.0
dtype: float64
>>> s.rolling(3).count()
0    1.0
1    2.0
2    2.0
3    2.0
dtype: float64
>>> s.rolling(4).count()
0    1.0
1    2.0
2    2.0
3    3.0
dtype: float64