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https://issues.apache.org/jira/browse/SPARK-9443?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14945593#comment-14945593
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Felix Cheung commented on SPARK-9443:
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is this sampleBy
http://spark.apache.org/docs/latest/api/scala/index.html#org.apache.spark.sql.DataFrameStatFunctions
> Expose sampleByKey in SparkR
> ----------------------------
>
> Key: SPARK-9443
> URL: https://issues.apache.org/jira/browse/SPARK-9443
> Project: Spark
> Issue Type: Bug
> Components: SparkR
> Affects Versions: 1.5.0
> Reporter: Hossein Falaki
>
> There is pull request for DataFrames (I believe close to merging) that adds
> sampleByKey. It would be great to expose it in SparkR.
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