pandas.stats.moments.expanding_apply¶
- pandas.stats.moments.expanding_apply(arg, func, min_periods=1, freq=None, center=False, time_rule=None)¶
Generic expanding function application
arg : Series, DataFrame func : function
Must produce a single value from an ndarray input- 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
- center : boolean, default False
- Whether the label should correspond with center of window
y : type of input argument