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https://issues.apache.org/jira/browse/SPARK-20083?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15943857#comment-15943857
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yuhao yang commented on SPARK-20083:
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So the result array will allow users to manipulate the matrix values. Is it
intentional?
> Change matrix toArray to not create a new array when matrix is already column
> major
> -----------------------------------------------------------------------------------
>
> Key: SPARK-20083
> URL: https://issues.apache.org/jira/browse/SPARK-20083
> Project: Spark
> Issue Type: Improvement
> Components: ML
> Affects Versions: 2.2.0
> Reporter: Seth Hendrickson
> Priority: Minor
>
> {{toArray}} always creates a new array in column major format, even when the
> resulting array is the same as the backing values. We should change this to
> just return a reference to the values array when it is already column major.
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