Class Summary
CumulativeGain Summing the gain.

Enum Summary
CumulativeGain.CumulationType SIMPLE:
Simple calculation of the sum of the gain of each RatedPhrase DISCOUNTED
Effect of labels decrease with their rank, as their gain is multiplied by a factor of 1 / log2(rank + 1) NORMALIZED_DISCOUNTED
As Discounted, but calculated sum divided by the maximum DiscountedCumulativeGain (DCG), that means the one with the best ordering of labels