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# pandas.rolling_var

`pandas.``rolling_var`(arg, window, min_periods=None, freq=None, center=False, time_rule=None, **kwargs)

  Unbiased moving variance

  Parameters : | arg : Series, DataFrame window : Number of observations used for calculating statistic min_periods : int Minimum number of observations in window required to have a value freq : None or string alias / date offset object, default=None Frequency to conform to before computing statistic time_rule is a legacy alias for freq
  Returns : | y : type of input argument

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