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https://issues.apache.org/jira/browse/SPARK-10349?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14721026#comment-14721026
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Apache Spark commented on SPARK-10349:
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User 'yanboliang' has created a pull request for this issue:
https://github.com/apache/spark/pull/8519
> OneVsRest use "when ... otherwise" not UDF to generate new label at binary
> reduction
> --------------------------------------------------------------------------------------
>
> Key: SPARK-10349
> URL: https://issues.apache.org/jira/browse/SPARK-10349
> Project: Spark
> Issue Type: Improvement
> Components: ML
> Reporter: Yanbo Liang
> Priority: Minor
>
> Currently OneVsRest use UDF to generate new binary label during training.
> Considering that SPARK-7321 has been merged, we can use "when ... otherwise"
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