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Posted to dev@mahout.apache.org by "Paritosh Ranjan (JIRA)" <ji...@apache.org> on 2012/10/09 01:02:03 UTC

[jira] [Comment Edited] (MAHOUT-1091) Bug in SequentialAccessSparseVector full iteration

    [ https://issues.apache.org/jira/browse/MAHOUT-1091?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13471891#comment-13471891 ] 

Paritosh Ranjan edited comment on MAHOUT-1091 at 10/8/12 11:01 PM:
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Just tried out of curiosity. The patch contains the fix and a junit test demonstrating the fix. 

All mahout test cases pass with this fix.
                
      was (Author: paritoshranjan):
    Just tried out of curiosity. The patch contains the fix and a junit test demonstrating the fix. 

The math module's test cases pass after this fix. Have not checked the complete build yet. 
                  
> Bug in SequentialAccessSparseVector full iteration
> --------------------------------------------------
>
>                 Key: MAHOUT-1091
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-1091
>             Project: Mahout
>          Issue Type: Bug
>          Components: Math
>            Reporter: Ted Dunning
>             Fix For: 0.8
>
>         Attachments: MAHOUT-1091.patch
>
>
> The iterator for the SequentialAccessSparseVector doesn't return any items beyond the last non-zero.  This breaks some stuff pretty massively, but hopefully doesn't break much user code since iterating through all elements of a sparse vector is a relatively rare thing to do.

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