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https://issues.apache.org/jira/browse/SPARK-9478?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean R. Owen resolved SPARK-9478.
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Fix Version/s: 3.0.0
Resolution: Fixed
> 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
> Assignee: zhengruifeng
> Priority: Major
> Fix For: 3.0.0
>
>
> 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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