Masahiro Kazama created SPARK-26981:
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Summary: Add 'Recall_at_k' metric to RankingMetrics
Key: SPARK-26981
URL: https://issues.apache.org/jira/browse/SPARK-26981
Project: Spark
Issue Type: New Feature
Components: MLlib
Affects Versions: 2.4.0
Reporter: Masahiro Kazama
Add 'Recall_at_k' metric to RankingMetrics.
Recall_at_k is often used for evaluating ranking models, especially for
recommendation system.
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