ExponentialMovingWindow.
var
Calculate the ewm (exponential weighted moment) variance.
Use a standard estimation bias correction.
For NumPy compatibility and will not have an effect on the result.
Return type is the same as the original object.
See also
pandas.Series.ewm
Calling ewm with Series data.
pandas.DataFrame.ewm
Calling ewm with DataFrames.
pandas.Series.var
Aggregating var for Series.
pandas.DataFrame.var
Aggregating var for DataFrame.