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https://issues.apache.org/jira/browse/SPARK-7157?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Reynold Xin updated SPARK-7157:
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Description: def sampleBy(c
> Add approximate stratified sampling to DataFrame
> ------------------------------------------------
>
> Key: SPARK-7157
> URL: https://issues.apache.org/jira/browse/SPARK-7157
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Reporter: Joseph K. Bradley
> Priority: Minor
>
> def sampleBy(c
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