[jira] [Created] (MAHOUT-1813) Functional "apply" DSL for distributed and in-memory matrices

["Andrew Palumbo (JIRA)" <ji...@apache.org>]

Andrew Palumbo created MAHOUT-1813:
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             Summary: Functional "apply" DSL for distributed and in-memory matrices
                 Key: MAHOUT-1813
                 URL: https://issues.apache.org/jira/browse/MAHOUT-1813
             Project: Mahout
          Issue Type: New Feature
    Affects Versions: 0.11.2
            Reporter: Andrew Palumbo
            Assignee: Andrew Palumbo
             Fix For: 0.12.0


We have functional "Assign" for in-memory matrices, e.g.:

{code}
    mxA := { x => x + 1 }
    mxA ::= { x=> x * 2 }
{code}

However, we lack similar unary elementwise function capability with distributed matrices, because distributed matrices are logically immutable.
The suggestion here is to use apply(func) to augment that capability for DRMs:

{code}
    drmA(x => x + 1)
    drmA(x => 2 * x)
{code}





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