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Posted to dev@mahout.apache.org by "Hudson (JIRA)" <ji...@apache.org> on 2016/04/11 10:42:28 UTC
[jira] [Commented] (MAHOUT-1813) Functional "apply" DSL for
distributed and in-memory matrices
[ https://issues.apache.org/jira/browse/MAHOUT-1813?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15234749#comment-15234749 ]
Hudson commented on MAHOUT-1813:
--------------------------------
FAILURE: Integrated in Mahout-Quality #3324 (See [https://builds.apache.org/job/Mahout-Quality/3324/])
MAHOUT-1813: Functional 'apply' DSL for distributed and in-memory (apalumbo: rev 812ae398c257b6e2ec87bcc8ef986d50c28e6025)
* math-scala/src/main/scala/org/apache/mahout/math/scalabindings/package.scala
* math-scala/src/test/scala/org/apache/mahout/math/drm/RLikeDrmOpsSuiteBase.scala
* math-scala/src/test/scala/org/apache/mahout/math/scalabindings/MatrixOpsSuite.scala
* math-scala/src/main/scala/org/apache/mahout/math/scalabindings/MatrixOps.scala
* math-scala/src/main/scala/org/apache/mahout/math/drm/DrmLikeOps.scala
> 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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