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https://issues.apache.org/jira/browse/SPARK-14661?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen resolved SPARK-14661.
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Resolution: Won't Fix
> Trim PCAModel by required explained variance
> --------------------------------------------
>
> Key: SPARK-14661
> URL: https://issues.apache.org/jira/browse/SPARK-14661
> Project: Spark
> Issue Type: New Feature
> Components: ML, MLlib
> Reporter: Piotr Suszyński
> Priority: Trivial
>
> PCA is often used to trim the number of features by using the minimal
> variance retained by those features. It would be very convenient to have a
> method in PCAModel that would return a trimmed model, especially given that
> the PCAModel constructor is private so doing this somewhere in the user code
> is not possible.
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