Dmitriy Lyubimov created MAHOUT-1730:
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Summary: 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.
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