The cumulative maximum is the maximum of the numbers starting from 0 to the current index. If you want to get the cumulative maximum of a pandas DataFrame/Series, use cummax
.
DataFrame.cumsum: Get Cumulative Sum Over Each Column

The cumulative maximum is the maximum of the numbers starting from 0 to the current index. If you want to get the cumulative maximum of a pandas DataFrame/Series, use cummax
.
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