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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAHOUT-835) Don't compute out of bag error for Decision Forests
Date Sun, 09 Oct 2011 20:15:29 GMT

    [ https://issues.apache.org/jira/browse/MAHOUT-835?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13123771#comment-13123771
] 

Hudson commented on MAHOUT-835:
-------------------------------

Integrated in Mahout-Quality #1089 (See [https://builds.apache.org/job/Mahout-Quality/1089/])
    MAHOUT-835 the Partial implementation avoids running unnecessary steps if the oob is not
required

adeneche : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1180672
Files : 
* /mahout/trunk/core/src/main/java/org/apache/mahout/df/mapreduce/partial/PartialBuilder.java

                
> Don't compute out of bag error for Decision Forests
> ---------------------------------------------------
>
>                 Key: MAHOUT-835
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-835
>             Project: Mahout
>          Issue Type: Improvement
>          Components: Classification
>    Affects Versions: 0.6
>            Reporter: Deneche A. Hakim
>            Assignee: Deneche A. Hakim
>             Fix For: 0.6
>
>
> The current implementation of Decision Forests makes a lot of assumption about how Hadoop
works when computing the out-of-bag error. Removing these calculations not only makes the
code run faster, it's also less buggier and won't break easily when a new version of Hadoop
is used.

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