You are viewing a plain text version of this content. The canonical link for it is here.

Posted to issues@spark.apache.org by "Joseph K. Bradley (JIRA)" <ji...@apache.org> on 2016/03/21 21:24:25 UTC

[jira] [Created] (SPARK-14043) Remove restriction on maxDepth for decision trees

Joseph K. Bradley created SPARK-14043:
-----------------------------------------

             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.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org
For additional commands, e-mail: issues-help@spark.apache.org