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Posted to issues@spark.apache.org by "Julian King (JIRA)" <ji...@apache.org> on 2018/08/06 08:15:00 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=16569855#comment-16569855 ]
Julian King commented on SPARK-9478:
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Has there been any progress on this in recent times? It looks like there are multiple pull requests for this but no comments in more than a year.... :(
> 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
> Priority: Major
>
> Currently, this implementation of random forest does not support sample (instance) weights. 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). Sample weights generalize class weights, so this could be used to add class weights later on.
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