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From "Suneel Marthi (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (MAHOUT-1148) QR Decomposition is too slow
Date Tue, 05 Feb 2013 04:10:13 GMT

    [ https://issues.apache.org/jira/browse/MAHOUT-1148?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13570893#comment-13570893
] 

Suneel Marthi edited comment on MAHOUT-1148 at 2/5/13 4:09 AM:
---------------------------------------------------------------

QRDecompositionTest.fullRankWide() is failing.

Here's what I am seeing locally:-

fullRankWide(org.apache.mahout.math.QRDecompositionTest)  Time elapsed: 0.004 sec  <<<
FAILURE!
java.lang.AssertionError: null
	at org.junit.Assert.fail(Assert.java:86)
	at org.junit.Assert.assertTrue(Assert.java:41)
	at org.junit.Assert.assertFalse(Assert.java:64)
	at org.junit.Assert.assertFalse(Assert.java:74)
	at org.apache.mahout.math.QRDecompositionTest.fullRankWide(QRDecompositionTest.java:117)

Its failing on this line in QRDecompositionTest.fullRankWide() 

   assertFalse(qr.getFullRank())


                
      was (Author: smarthi):
    QRDecompositionTest.fullRankWide() is failing.

Here's what I am seeing locally:-

fullRankWide(org.apache.mahout.math.QRDecompositionTest)  Time elapsed: 0.004 sec  <<<
FAILURE!
java.lang.AssertionError: null
	at org.junit.Assert.fail(Assert.java:86)
	at org.junit.Assert.assertTrue(Assert.java:41)
	at org.junit.Assert.assertFalse(Assert.java:64)
	at org.junit.Assert.assertFalse(Assert.java:74)
	at org.apache.mahout.math.QRDecompositionTest.fullRankWide(QRDecompositionTest.java:117)
                  
> QR Decomposition is too slow
> ----------------------------
>
>                 Key: MAHOUT-1148
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1148
>             Project: Mahout
>          Issue Type: Bug
>            Reporter: Ted Dunning
>
> A user reported that QR decomposition is too slow.  I coded up a replacement that can
be 10x faster under certain cases and the new version is also tested.

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