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Posted to dev@mahout.apache.org by "Ikumasa Mukai (Updated) (JIRA)" <ji...@apache.org> on 2012/01/24 14:06:47 UTC

[jira] [Updated] (MAHOUT-954) "Unpredictable" have to be represented by NaN on DF.

     [ https://issues.apache.org/jira/browse/MAHOUT-954?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ikumasa Mukai updated MAHOUT-954:
---------------------------------

    Attachment: MAHOUT-954.patch

Here is a patch for this issue.
                
> "Unpredictable" have to be represented by NaN on DF.
> ----------------------------------------------------
>
>                 Key: MAHOUT-954
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-954
>             Project: Mahout
>          Issue Type: Bug
>          Components: Classification
>            Reporter: Ikumasa Mukai
>              Labels: DecisionForest, Regression
>         Attachments: MAHOUT-954.patch
>
>
> On our RandomForest src, we uses "-1" for representing "Unpredictable",
> but for regression problem, there is a case which outputs "-1" for the correct result.
> For resolving this problem, we should change the unpredictable flag to "NaN" from "-1".

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