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From "Manish Amde (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (SPARK-1544) Add support for deep decision trees.
Date Tue, 22 Apr 2014 05:46:15 GMT

     [ https://issues.apache.org/jira/browse/SPARK-1544?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Manish Amde resolved SPARK-1544.
--------------------------------

    Resolution: Fixed

PR here.
https://github.com/apache/spark/pull/475

> Add support for deep decision trees.
> ------------------------------------
>
>                 Key: SPARK-1544
>                 URL: https://issues.apache.org/jira/browse/SPARK-1544
>             Project: Spark
>          Issue Type: Improvement
>          Components: MLlib
>    Affects Versions: 1.0.0
>            Reporter: Manish Amde
>            Assignee: Manish Amde
>
> The current tree implementation stores an Array[Double] of size O(#features \ #splits
* 2^maxDepth)* in memory for aggregating histograms over partitions. The current implementation
might not scale to very deep trees since the memory requirement grows exponentially with tree
depth. 
> This task enables construction of arbitrary deep trees.



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