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Posted to issues@spark.apache.org by "Xiangrui Meng (JIRA)" <ji...@apache.org> on 2014/08/02 00:53:40 UTC

[jira] [Updated] (SPARK-2796) DecisionTree bug with ordered categorical features

     [ https://issues.apache.org/jira/browse/SPARK-2796?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Xiangrui Meng updated SPARK-2796:
---------------------------------

    Assignee: Joseph K. Bradley

> DecisionTree bug with ordered categorical features
> --------------------------------------------------
>
>                 Key: SPARK-2796
>                 URL: https://issues.apache.org/jira/browse/SPARK-2796
>             Project: Spark
>          Issue Type: Bug
>          Components: MLlib
>    Affects Versions: 1.0.0
>            Reporter: Joseph K. Bradley
>            Assignee: Joseph K. Bradley
>             Fix For: 1.1.0
>
>
> In DecisionTree, the method sequentialBinSearchForOrderedCategoricalFeatureInClassification() indexed bins from 0 to (math.pow(2, featureCategories.toInt - 1) - 1).  This upper bound is the bound for unordered categorical features, not ordered ones.  The upper bound should be the arity (i.e., max value) of the feature.



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