[jira] [Commented] (MAHOUT-1696) QRDecomposition.solve(...) can return incorrect Matrix types

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MAHOUT-1696?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14511938#comment-14511938 ] 

ASF GitHub Bot commented on MAHOUT-1696:
----------------------------------------

GitHub user andrewpalumbo opened a pull request:

    https://github.com/apache/mahout/pull/124

    MAHOUT-1696: QRDecomposition.solve(...) can return incorrect Matrix types 

    

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/andrewpalumbo/mahout qrFix

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/mahout/pull/124.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #124
    
----
commit 69a1e134c3a46bbbff08c9f68c057737fee364d3
Author: Andrew Palumbo <ap...@apache.org>
Date:   2015-04-24T22:38:06Z

    Store a small matrix

----


> QRDecomposition.solve(...) can return incorrect Matrix types
> ------------------------------------------------------------
>
>                 Key: MAHOUT-1696
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1696
>             Project: Mahout
>          Issue Type: Bug
>          Components: Math
>    Affects Versions: 0.10.0
>            Reporter: Andrew Palumbo
>            Assignee: Andrew Palumbo
>             Fix For: 0.10.1, 0.11.0
>
>
> in QRDecomposition.java, QRDecomposition(Matrix A).solve(Matrix B) is returning a Matrix of type B when it should be returning a matrix of type A.  This can lead to Sparse Matrices which should be Dense and vice versa.   



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