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https://issues.apache.org/jira/browse/SPARK-13646?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen resolved SPARK-13646.
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Resolution: Fixed
Fix Version/s: 2.0.0
Issue resolved by pull request 11491
[https://github.com/apache/spark/pull/11491]
> QuantileDiscretizer counts dataset twice in getSampledInput
> -----------------------------------------------------------
>
> Key: SPARK-13646
> URL: https://issues.apache.org/jira/browse/SPARK-13646
> Project: Spark
> Issue Type: Improvement
> Components: ML
> Affects Versions: 1.6.0
> Reporter: Abou Haydar Elias
> Priority: Trivial
> Labels: patch, performance
> Fix For: 2.0.0
>
>
> getSampledInput counts the dataset twice as you see here :
> [https://github.com/apache/spark/blob/master/mllib/src/main/scala/org/apache/spark/ml/feature/QuantileDiscretizer.scala#L116]
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