pandas.core.window.Expanding.mean

Expanding.mean(self, *args, **kwargs)[source]

Calculate the expanding mean of the values.

Parameters
*args

Under Review.

**kwargs

Under Review.

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.

Series.mean

Equivalent method for Series.

DataFrame.mean

Equivalent method for DataFrame.

Examples

The below examples will show rolling mean calculations with window sizes of two and three, respectively.

>>> s = pd.Series([1, 2, 3, 4])
>>> s.rolling(2).mean()
0    NaN
1    1.5
2    2.5
3    3.5
dtype: float64
>>> s.rolling(3).mean()
0    NaN
1    NaN
2    2.0
3    3.0
dtype: float64
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