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https://issues.apache.org/jira/browse/MAHOUT-1730?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Suneel Marthi closed MAHOUT-1730.
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> new mutable transposition view for in-core matrices.
> ----------------------------------------------------
>
> Key: MAHOUT-1730
> URL: https://issues.apache.org/jira/browse/MAHOUT-1730
> Project: Mahout
> Issue Type: Improvement
> Reporter: Dmitriy Lyubimov
> Assignee: Dmitriy Lyubimov
> Fix For: 0.10.2
>
>
> in-core mxA.t rewrite with mostly two goals in mind:
> (1) enable mutability , e.g.
> for (col <- mxA.t) col := k
> (2) translate matrix structural flavor for optimizers correctly. i.e. new
> SparseRowMatrix.t carries on as column-major structure.
> Also it does unwrapping automatically, i.e. mxA.t.t eq mxA is true.
> there are other smaller goals hit in this rewrite, e.g. various efficient
> assigns.
> PR https://github.com/apache/mahout/pull/135
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