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