yuhao yang created SPARK-13223:
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Summary: Add stratified sampling to ML feature engineering
Key: SPARK-13223
URL: https://issues.apache.org/jira/browse/SPARK-13223
Project: Spark
Issue Type: New Feature
Components: ML
Reporter: yuhao yang
Priority: Minor
I found it useful to add an sampling transformer during a case of fraud
detection. It can be used in resampling or overSampling, which in turn is
required by ensemble and unbalanced data processing.
Internally, it invoke the sampleByKey in Pair RDD operation.
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