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https://issues.apache.org/jira/browse/SPARK-7424?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15218244#comment-15218244
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Apache Spark commented on SPARK-7424:
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User 'yanboliang' has created a pull request for this issue:
https://github.com/apache/spark/pull/12066
> spark.ml classification, regression abstractions should add metadata to
> output column
> -------------------------------------------------------------------------------------
>
> Key: SPARK-7424
> URL: https://issues.apache.org/jira/browse/SPARK-7424
> Project: Spark
> Issue Type: Improvement
> Components: ML
> Reporter: Joseph K. Bradley
>
> Update ClassificationModel, ProbabilisticClassificationModel prediction to
> include numClasses in output column metadata.
> Update RegressionModel to specify output column metadata as well.
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