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https://issues.apache.org/jira/browse/SPARK-19078?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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zhengruifeng closed SPARK-19078.
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Resolution: Duplicate
> hashingTF,ChiSqSelector,IDF,StandardScaler,PCA transform avoid extra vector
> conversion
> --------------------------------------------------------------------------------------
>
> Key: SPARK-19078
> URL: https://issues.apache.org/jira/browse/SPARK-19078
> Project: Spark
> Issue Type: Improvement
> Components: ML
> Reporter: zhengruifeng
> Priority: Minor
>
> There some ML.algs (hashingTF,ChiSqSelector,IDF,StandardScaler,PCA,LDA) that
> use oldModel in MLlib in {{transform}} method, this will cause extra
> conversion of vectors and matrices.
> This pr modify transform to direct use ml.linalg in
> {{hashingTF,ChiSqSelector,IDF,StandardScaler,PCA}}.
> I do not touch LDA because it is more complicated than others.
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