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https://issues.apache.org/jira/browse/SPARK-3724?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15213667#comment-15213667
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Yong Tang commented on SPARK-3724:
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[~josephkb] I just created a pull request for this issue. Let me know if there
are any issues.
> RandomForest: More options for feature subset size
> --------------------------------------------------
>
> Key: SPARK-3724
> URL: https://issues.apache.org/jira/browse/SPARK-3724
> Project: Spark
> Issue Type: Improvement
> Components: MLlib
> Reporter: Joseph K. Bradley
> Priority: Minor
>
> RandomForest currently supports using a few values for the number of features
> to sample per node: all, sqrt, log2, etc. It should support any given value
> (to allow model search).
> Proposal: If the parameter for specifying the number of features per node is
> not recognized (as “all”, “sqrt”, etc.), then it will be parsed as a
> numerical value. The value should be either (a) a real value in [0,1]
> specifying the fraction of features in each subset or (b) an integer value
> specifying the number of features in each subset.
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