Github user myui commented on a diff in the pull request:
https://github.com/apache/incubator-hivemall/pull/111#discussion_r139900716
--- Diff:
core/src/main/java/hivemall/evaluation/GradedResponsesMeasures.java ---
@@ -54,4 +54,23 @@ public static double DCG(final List<Double>
topRelScoreList, final int recommend
return dcg;
}
+
+ /**
+ * Computes Reciprocal HitRank (RHR)
+ *
+ * @param recommendList predicted item list order by score
+ * @param truthList gruond truth item list order by rank
+ * @param recommendSize the number of positive items
+ * @return RHR
+ */
+ public static double RHR(final List<?> recommendList, final List<?>
truthList,
--- End diff --
@nzw0301 (cc: @takuti )
This is not graded response but binary response.
`ReciprocalRank` is already implemented in `BinaryResponseMeasures` and
`MRRUDAF` implements [Mean reciprocal
rank](https://en.wikipedia.org/wiki/Mean_reciprocal_rank).
ARHRUDAF is duplicate to MRRUDAF and MRR is more generic name of ARHR.
[Average reciprocal hit-rate is also referred to as the mean reciprocal
rank
(MRR)](https://books.google.co.jp/books?id=GKjWCwAAQBAJ&pg=PA246&lpg=PA246&dq=%22average+reciprocal+hit-rate%22+MRR&source=bl&ots=Tq_wVfI-QU&sig=Hbyh-R1Sm7M26pZbHPjuTfyXXqI&hl=ja&sa=X&ved=0ahUKEwie1MD0prPWAhWMW7wKHVHzD88Q6AEIJzAA#v=onepage&q=%22average%20reciprocal%20hit-rate%22%20MRR&f=false)
---
