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# pandas.expanding_min

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

  Moving min of 1d array of dtype=float64 along axis=0 ignoring NaNs. Expanding minimum.

  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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