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https://issues.apache.org/jira/browse/SPARK-7422?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14537583#comment-14537583
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George Dittmar commented on SPARK-7422:
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In the jira where it mentions inactive elements, are you just referring to
elements with a 0 value or can these vectors store some other representation of
not having an element?
> Add argmax to Vector, SparseVector
> ----------------------------------
>
> Key: SPARK-7422
> URL: https://issues.apache.org/jira/browse/SPARK-7422
> Project: Spark
> Issue Type: New Feature
> Components: MLlib
> Reporter: Joseph K. Bradley
> Priority: Minor
> Labels: starter
>
> DenseVector has an argmax method which is currently private to Spark. It
> would be nice to add that method to Vector and SparseVector. Adding it to
> SparseVector would require being careful about handling the inactive elements
> correctly and efficiently.
> We should make argmax public and add unit tests.
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