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