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From "Dmitriy Lyubimov (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAHOUT-1300) Support for easy functional matrix views and some of their derivatives
Date Mon, 16 Sep 2013 18:10:51 GMT

    [ https://issues.apache.org/jira/browse/MAHOUT-1300?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13768563#comment-13768563
] 

Dmitriy Lyubimov commented on MAHOUT-1300:
------------------------------------------

Ok i guess since i haven't heard from anyone, i will commit this this week then. 

-d
                
> Support for easy functional matrix views and some of their derivatives
> ----------------------------------------------------------------------
>
>                 Key: MAHOUT-1300
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1300
>             Project: Mahout
>          Issue Type: Improvement
>    Affects Versions: 0.8
>            Reporter: Dmitriy Lyubimov
>            Assignee: Dmitriy Lyubimov
>             Fix For: 0.9
>
>         Attachments: MAHOUT-1300.patch, MAHOUT-1300.patch.1, MAHOUT-1300.patch.2
>
>
> Support for easy matrix views based on (Int,Int)=>Double function. 
> Current derived views: 
> (1) general functional view
> (2) transposed matrix view
> (3) uniform matrix view (based on function composition over symmetric uniform)
> (4) symmetric uniform matrix view (based on murmur64)
> (5) random gaussian matrix view.
> I know that there's a trinary random matrix as well which could be scripted out as a
view as well (methinks), as well as Omega thing in distributed SSVD which also perhaps could
be replaced by a symmetric uniform view.

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