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https://issues.apache.org/jira/browse/SPARK-5895?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14511820#comment-14511820
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Joseph K. Bradley commented on SPARK-5895:
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Based on the updated
[https://cwiki.apache.org/confluence/display/SPARK/Contributing+to+Spark]
guide, it sounds like the practice is: Go ahead and post here that you're
beginning work, start working on it and submit the PR, and then the Assignee
field will be filled after the PR is merged. So please go ahead---thanks!
> Add VectorSlicer
> ----------------
>
> Key: SPARK-5895
> URL: https://issues.apache.org/jira/browse/SPARK-5895
> Project: Spark
> Issue Type: Sub-task
> Components: ML
> Reporter: Xiangrui Meng
>
> `VectorSlicer` takes a vector column and output a vector column with a subset
> of features.
> {code}
> val vs = new VectorSlicer()
> .setInputCol("user")
> .setSelectedFeatures("age", "salary")
> .setOutputCol("usefulUserFeatures")
> {code}
> We should allow specifying selected features by indices and by names. It
> should preserve the output names.
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