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Posted to issues@spark.apache.org by "Xiangrui Meng (JIRA)" <ji...@apache.org> on 2014/08/15 23:57:19 UTC

[jira] [Resolved] (SPARK-3041) DecisionTree: isSampleValid indexing incorrect

     [ https://issues.apache.org/jira/browse/SPARK-3041?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Xiangrui Meng resolved SPARK-3041.
----------------------------------

       Resolution: Fixed
    Fix Version/s: 1.1.0

> DecisionTree: isSampleValid indexing incorrect
> ----------------------------------------------
>
>                 Key: SPARK-3041
>                 URL: https://issues.apache.org/jira/browse/SPARK-3041
>             Project: Spark
>          Issue Type: Bug
>          Components: MLlib
>    Affects Versions: 1.1.0
>            Reporter: Joseph K. Bradley
>            Assignee: Joseph K. Bradley
>             Fix For: 1.1.0
>
>
> In DecisionTree, isSampleValid treats unordered categorical features incorrectly: It treated the bins as if indexed by featured values, rather than by subsets of values/categories.
> This bug is exhibited for unordered features (multi-class classification with categorical features of low arity).
> Proposed fix: Index bins correctly for unordered categorical features.



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