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https://issues.apache.org/jira/browse/MAHOUT-1299?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13724973#comment-13724973
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Ted Dunning commented on MAHOUT-1299:
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I think row or column preference plus perhaps some sparsity information should
be sufficient.
>From that, I think that the multiplication can decide what it needs to do.
>The options include dot products (if orientation is good), outer products
>(especially for sparse cases) and possibly diagonal special cases.
> Add optimized versions of timesLeft(), timesRight() to
> SparseRow~,SparseColMatrices
> -----------------------------------------------------------------------------------
>
> Key: MAHOUT-1299
> URL: https://issues.apache.org/jira/browse/MAHOUT-1299
> Project: Mahout
> Issue Type: New Feature
> Affects Versions: 0.8
> Reporter: Dmitriy Lyubimov
> Assignee: Dmitriy Lyubimov
> Priority: Minor
> Fix For: 0.9
>
>
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