pandas.core.window.expanding.Expanding.mean¶

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

Calculate the expanding mean of the values.

Parameters

Returns

Series or DataFrame: Returned object type is determined by the caller of the expanding calculation.

See also

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