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https://issues.apache.org/jira/browse/SPARK-10936?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon resolved SPARK-10936.
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Resolution: Incomplete
> UDAF "mode" for categorical variables
> -------------------------------------
>
> Key: SPARK-10936
> URL: https://issues.apache.org/jira/browse/SPARK-10936
> Project: Spark
> Issue Type: New Feature
> Components: ML, SQL
> Reporter: Xiangrui Meng
> Priority: Major
> Labels: bulk-closed
>
> This is similar to frequent items except that we don't have a threshold on
> the frequency. So an exact implementation might require a global shuffle.
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