pandas.core.window.expanding.Expanding.count¶

Expanding.count(self, **kwargs)[source]¶

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

Series.expanding: Calling object with Series data.
DataFrame.expanding: Calling object with DataFrames.
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