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https://issues.apache.org/jira/browse/SPARK-12531?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15072582#comment-15072582
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Sean Owen commented on SPARK-12531:
-----------------------------------
That wasn't my point -- you can't compute them exactly and efficiently at the
same time, since you either hold all data in memory or approximate. It's not
that they're hard to implement in the naive way.
> Add median and mode to Summary statistics
> -----------------------------------------
>
> Key: SPARK-12531
> URL: https://issues.apache.org/jira/browse/SPARK-12531
> Project: Spark
> Issue Type: Improvement
> Components: MLlib
> Affects Versions: 1.5.2
> Reporter: Gaurav Kumar
> Priority: Minor
>
> Summary statistics should also include calculating median and mode in
> addition to mean, variance and others.
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