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https://issues.apache.org/jira/browse/SPARK-9681?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14659610#comment-14659610
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Apache Spark commented on SPARK-9681:
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User 'ericl' has created a pull request for this issue:
https://github.com/apache/spark/pull/7987
> Support R feature interactions in RFormula
> ------------------------------------------
>
> Key: SPARK-9681
> URL: https://issues.apache.org/jira/browse/SPARK-9681
> Project: Spark
> Issue Type: Improvement
> Components: ML, SparkR
> Reporter: Eric Liang
>
> Support the interaction (":") operator RFormula feature transformer, so that
> it is available for use in SparkR's glm.
> Umbrella design doc for RFormula integration:
> https://docs.google.com/document/d/10NZNSEurN2EdWM31uFYsgayIPfCFHiuIu3pCWrUmP_c/edit?pli=1
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