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# pandas.stats.moments.expanding_sum

`pandas.stats.moments.``expanding_sum`(arg, min_periods=1, freq=None, center=False, **kwargs)

  Expanding sum.

  Parameters : | arg : Series, DataFrame min_periods : int, default None Minimum number of observations in window required to have a value (otherwise result is NA). freq : string or DateOffset object, optional (default None) Frequency to conform the data to before computing the statistic. Specified as a frequency string or DateOffset object.
  Returns : | y : type of input argument

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