maxframe.dataframe.groupby.GroupBy.expanding#

GroupBy.expanding(min_periods=1, *, shift=0, reverse_range=False, order_cols=None, ascending=True)#

Return an expanding grouper, providing expanding functionality per group.

Parameters:

  • min_periods (int, default None) – Minimum number of observations in window required to have a value; otherwise, result is np.nan.

  • shift (int, default 0) – If specified, the window will be shifted by shift rows (or data will be shifted by -shift rows) before computing window function.

  • reverse_range (bool, default False) – If True, the window for current row is expanded from the last row to the current instead of the first row.

Return type:

maxframe.dataframe.groupby.ExpandingGroupby

See also

Series.groupby

Apply a function groupby to a Series.

DataFrame.groupby

Apply a function groupby to each row or column of a DataFrame.