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https://issues.apache.org/jira/browse/SPARK-24710?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16578045#comment-16578045
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Aleksey Zinoviev commented on SPARK-24710:
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Could I take this ticket?
> Information Gain Ratio for decision trees
> -----------------------------------------
>
> Key: SPARK-24710
> URL: https://issues.apache.org/jira/browse/SPARK-24710
> Project: Spark
> Issue Type: New Feature
> Components: ML
> Affects Versions: 2.3.1
> Reporter: Pablo J. Villacorta
> Priority: Minor
> Labels: features
>
> Spark currently uses Information Gain (IG) to decide the next feature to
> branch on when building a decision tree. In case of categorical features, IG
> is known to be biased towards features with a large number of categories.
> [Information Gain Ratio|https://en.wikipedia.org/wiki/Information_gain_ratio]
> solves this problem by dividing the IG by a number that characterizes the
> intrinsic information of a feature.
> As far as I know, Spark has IG but not IGR. It would be nice to have the
> possibility to choose IGR instead of IG.
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