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Posted to dev@mahout.apache.org by "Suneel Marthi (JIRA)" <ji...@apache.org> on 2015/08/07 17:56:47 UTC

[jira] [Closed] (MAHOUT-1727) Elementwise analogues of scala.math functions for tensor types

     [ https://issues.apache.org/jira/browse/MAHOUT-1727?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Suneel Marthi closed MAHOUT-1727.
---------------------------------

> Elementwise analogues of scala.math functions for tensor types
> --------------------------------------------------------------
>
>                 Key: MAHOUT-1727
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1727
>             Project: Mahout
>          Issue Type: Improvement
>            Reporter: Dmitriy Lyubimov
>            Assignee: Dmitriy Lyubimov
>             Fix For: 0.10.2
>
>
> what we mean here: 
> log(5)
> vlog(vec)
> mlog(mxA)
> dlog(drmA)
> in R, all these variants are enacted by single function log(x). Unfortunately, we cannot overload standard functions since they are defined in another package and Scala would allow such an overload.
> Hence, notation conventions: 
> vector functions are prepended by 'v': vlog, vabs...
> in-core matrix functions are prepended by 'm': mlog, mabs...
> DRM functions are prepended by 'd' (for distributed): dlog, dabs...
> PR https://github.com/apache/mahout/pull/135



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