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Posted to issues@spark.apache.org by "Seth Hendrickson (JIRA)" <ji...@apache.org> on 2016/11/18 04:51:58 UTC

[jira] [Commented] (SPARK-9478) Add sample weights to Random Forest

    [ https://issues.apache.org/jira/browse/SPARK-9478?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15675770#comment-15675770 ] 

Seth Hendrickson commented on SPARK-9478:
-----------------------------------------

I'm going to work on submitting a PR for adding sample weights for 2.2. That pr is for adding class weights, which I think we decided against.

> Add sample weights to Random Forest
> -----------------------------------
>
>                 Key: SPARK-9478
>                 URL: https://issues.apache.org/jira/browse/SPARK-9478
>             Project: Spark
>          Issue Type: Improvement
>          Components: ML
>    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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