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From "Patrick Crenshaw (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SPARK-9478) Add class weights to Random Forest
Date Tue, 04 Aug 2015 15:31:04 GMT

    [ https://issues.apache.org/jira/browse/SPARK-9478?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14653799#comment-14653799
] 

Patrick Crenshaw commented on SPARK-9478:
-----------------------------------------

If I work on this, should I wait until https://issues.apache.org/jira/browse/SPARK-3717 is
finished?

> Add class weights to Random Forest
> ----------------------------------
>
>                 Key: SPARK-9478
>                 URL: https://issues.apache.org/jira/browse/SPARK-9478
>             Project: Spark
>          Issue Type: Improvement
>          Components: ML, MLlib
>    Affects Versions: 1.4.1
>            Reporter: Patrick Crenshaw
>
> Currently, this implementation of random forest does not support class weights. Class
weights are important when there is imbalanced training data or the evaluation metric of a
classifier is imbalanced (e.g. true positive rate at some false positive threshold). 



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