Chelsea Zhang created SPARK-8468:
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Summary: Cross-validation with RegressionEvaluator prefers higher
RMSE
Key: SPARK-8468
URL: https://issues.apache.org/jira/browse/SPARK-8468
Project: Spark
Issue Type: Bug
Components: ML
Affects Versions: 1.4.0
Reporter: Chelsea Zhang
Please correct me if I'm wrong, but RegressionEvaluator seems to implement the
evaluate() method backwards. The interface expects higher return values from
evaluate() to indicate better models. RegressionEvaluator returns RMSE by
default - a value we should try to minimize.
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