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https://issues.apache.org/jira/browse/SPARK-27584?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16827596#comment-16827596
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Apache Spark commented on SPARK-27584:
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User 'pntuananh' has created a pull request for this issue:
https://github.com/apache/spark/pull/24478
> Add 'Mean reciprocal rank' to RankingMetrics
> ---------------------------------------------
>
> Key: SPARK-27584
> URL: https://issues.apache.org/jira/browse/SPARK-27584
> Project: Spark
> Issue Type: New Feature
> Components: MLlib
> Affects Versions: 2.4.2
> Reporter: Pham Nguyen Tuan Anh
> Priority: Minor
>
> Add Mean reciprocal rank (MRR) to RankingMetrics.
> [https://en.wikipedia.org/wiki/Mean_reciprocal_rank]
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