pandas.core.window.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
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