Dmitriy Lyubimov created MAHOUT-1728:
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Summary: in-core functional assignments
Key: MAHOUT-1728
URL: https://issues.apache.org/jira/browse/MAHOUT-1728
Project: Mahout
Issue Type: Improvement
Reporter: Dmitriy Lyubimov
Assignee: Dmitriy Lyubimov
Fix For: 0.10.2
in-core functional assignments (for vector and matrices)
mxA := { (x) => x * x}
mxA := { (row, col, x} => ... }
mxA ::={ (x) => ... }
mxA ::={ (row, col, x} => ...}
vec := { (x) => ...}
vec :={ (idx, x) => ..}
vec ::= { (x) => ...}
vec ::={ (ind, x) => ...}
the `:=` assignmentn applies the function to all elements of tensor.
the `::=` assignment ignores zero elements of the tensor to improve
performance.
matrix functions iterations use matrix structural flavor to optimize traversal.
further examples.
mxA := exp _ (in-place exponent)
v := abs _
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