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https://issues.apache.org/jira/browse/SPARK-10385?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15081538#comment-15081538
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Gaurav Kumar edited comment on SPARK-10385 at 1/4/16 6:35 PM:
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Is this done? This has also been quoted on the Spark-1.6 release page.
was (Author: gauravkumar37):
I believe this is done and has also been quoted on the Spark-1.6 release page.
> Bivariate statistics in DataFrames
> ----------------------------------
>
> Key: SPARK-10385
> URL: https://issues.apache.org/jira/browse/SPARK-10385
> Project: Spark
> Issue Type: Umbrella
> Components: ML, SQL
> Reporter: Xiangrui Meng
> Assignee: Burak Yavuz
>
> Similar to SPARK-10384, it would be nice to have bivariate statistics support
> in DataFrames (defined as UDAFs). This JIRA discuss general implementation
> and track subtasks. Bivariate statistics include:
> * continuous: covariance, Pearson's correlation (SPARK-9298), and Spearman's
> correlation
> * categorical: ??
> If we define them as UDAFs, it would be flexible to use them with DataFrames,
> e.g.,
> {code}
> df.groupBy("key").agg(corr("x", "y"))
> {code}
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