Sean R. Owen reassigned SPARK-9478:

    Assignee: zhengruifeng

> 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
> 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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