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https://issues.apache.org/jira/browse/SPARK-3724?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Nick Pentreath resolved SPARK-3724.
-----------------------------------
Resolution: Fixed
Fix Version/s: 2.0.0
Issue resolved by pull request 11989
[https://github.com/apache/spark/pull/11989]
> 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
> Assignee: Yong Tang
> Priority: Minor
> Fix For: 2.0.0
>
>
> 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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