Joseph K. Bradley created SPARK-14043:
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Summary: Remove restriction on maxDepth for decision trees
Key: SPARK-14043
URL: https://issues.apache.org/jira/browse/SPARK-14043
Project: Spark
Issue Type: Improvement
Components: ML
Reporter: Joseph K. Bradley
Priority: Minor
We currently restrict decision trees (DecisionTree, GBT, RandomForest) to be of
maxDepth <= 30. We should remove this restriction to support deep (imbalanced)
trees.
Trees store an index for each node, where each index corresponds to a unique
position in a binary tree. (I.e., the first index of row 0 is 1, the first of
row 1 is 2, the first of row 2 is 4, etc., IIRC)
With some careful thought, we could probably avoid using indices altogether.
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