[jira] [Updated] (MAHOUT-1300) Support for easy functional matrix views and some of their derivatives

["Dmitriy Lyubimov (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/MAHOUT-1300?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dmitriy Lyubimov updated MAHOUT-1300:
-------------------------------------

    Status: Patch Available  (was: Open)
    
> 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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