ExponentialMovingWindow.
var
Exponential weighted moving variance.
Use a standard estimation bias correction.
Arguments and keyword arguments to be passed into func.
Return type is determined by the caller.
See also
pandas.Series.ewm
Calling object with Series data.
pandas.DataFrame.ewm
Calling object with DataFrame data.
pandas.Series.var
Similar method for Series.
pandas.DataFrame.var
Similar method for DataFrame.