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

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


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.


y : type of input argument