pandas.DataFrame.cummax

DataFrame.cummax(axis=None, dtype=None, out=None, skipna=True, **kwargs)

Return cumulative cummax over requested axis.

Parameters:

axis : {index (0), columns (1)}

skipna : boolean, default True

Exclude NA/null values. If an entire row/column is NA, the result will be NA

Returns:

cummax : Series

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https://pandas.pydata.org/pandas-docs/version/0.18.1/generated/pandas.DataFrame.cummax.html