[jira] [Commented] (SPARK-5895) Add VectorSlicer

["Apache Spark (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-5895?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14658850#comment-14658850 ] 

Apache Spark commented on SPARK-5895:
-------------------------------------

User 'jkbradley' has created a pull request for this issue:
https://github.com/apache/spark/pull/7972

> 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
>            Assignee: Xusen Yin
>
> `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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