Manoj Kumar created SPARK-16307:
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Summary: Improve testing for DecisionTree variances
Key: SPARK-16307
URL: https://issues.apache.org/jira/browse/SPARK-16307
Project: Spark
Issue Type: Test
Reporter: Manoj Kumar
Priority: Minor
The current test assumes that Impurity.calculate() returns the variance
correctly. A better approach would be to test if the variance returned equals
the variance that we can manually verify on a toy data and tree.
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