Nick Pentreath created SPARK-14409:
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Summary: Investigate adding a RankingEvaluator to ML
Key: SPARK-14409
URL: https://issues.apache.org/jira/browse/SPARK-14409
Project: Spark
Issue Type: New Feature
Components: ML
Reporter: Nick Pentreath
Priority: Minor
{{mllib.evaluation}} contains a {{RankingMetrics}} class, while there is no
{{RankingEvaluator}} in {{ml.evaluation}}. Such an evaluator can be useful for
recommendation evaluation (and can be useful in other settings potentially).
Should be thought about in conjunction with adding the "recommendAll" methods
in SPARK-13857, so that top-k ranking metrics and be used in cross-validators.
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