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https://issues.apache.org/jira/browse/HIVEMALL-243?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Makoto Yui updated HIVEMALL-243:
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Summary: Fix nominal variable handling in DecisionTree and RegressionTree
(was: Fixed nominal variable handling in DecisionTree and RegressionTree)
> Fix nominal variable handling in DecisionTree and RegressionTree
> ----------------------------------------------------------------
>
> Key: HIVEMALL-243
> URL: https://issues.apache.org/jira/browse/HIVEMALL-243
> Project: Hivemall
> Issue Type: Task
> Affects Versions: 0.5.2
> Reporter: Makoto Yui
> Assignee: Makoto Yui
> Priority: Minor
> Fix For: 0.6.0
>
>
> For NOMINAL variable, the maximum attribute index 'm' is used for computing
> splits.
> This cause performance issues for sparse nominal variables. So, revise this
> handling for a better performance.
> https://github.com/apache/incubator-hivemall/blob/master/core/src/main/java/hivemall/smile/classification/DecisionTree.java#L703
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