Change cumulative curve like roc_curve#98

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lugq1990 wants to merge 4 commits intoreiinakano:masterfrom

lugq1990:master

Commits on Dec 4, 2018

Add cumulative gain curve with different classes
Guangqiang Lu
authored
Merge pull request #1 from lugq1990/change_cumulative
Guangqiang Lu
authored

Commits on Jul 8, 2019

modify metrics function with digits to control the digits that wants to show
lugq1990
committed
When add the digits paramter, missing with the class area digits format, add now.
lugq1990
committed