Joseph K. Bradley created SPARK-3724:
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Summary: 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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