Makoto Yui created HIVEMALL-243:
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Summary: Fixed 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
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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