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https://issues.apache.org/jira/browse/MAHOUT-1721?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dmitriy Lyubimov updated MAHOUT-1721:
-------------------------------------
    Description: 
we have rowSums() that are enabled only if matrix is int-keyed (DrmLike[Int]), 
because non-int keys cannot be mapped to ordinal positions. 

however, this api still can exist -- except the output should really be 
Map[K,Double].

PR https://github.com/apache/mahout/pull/135

  was:
we have rowSums() that are enabled only if matrix is int-keyed (DrmLike[Int]), 
because non-int keys cannot be mapped to ordinal positions. 

however, this api still can exist -- except the output should really be 
Map[K,Double].


> rowSumsMap summary for non-int-keyed DRMs
> -----------------------------------------
>
>                 Key: MAHOUT-1721
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1721
>             Project: Mahout
>          Issue Type: Improvement
>            Reporter: Dmitriy Lyubimov
>            Assignee: Dmitriy Lyubimov
>             Fix For: 0.10.2
>
>
> we have rowSums() that are enabled only if matrix is int-keyed 
> (DrmLike[Int]), because non-int keys cannot be mapped to ordinal positions. 
> however, this api still can exist -- except the output should really be 
> Map[K,Double].
> PR https://github.com/apache/mahout/pull/135



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