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Posted to issues@spark.apache.org by "Yanbo Liang (JIRA)" <ji...@apache.org> on 2016/07/04 06:16:10 UTC

[jira] [Updated] (SPARK-16307) Improve testing for DecisionTree variances

     [ https://issues.apache.org/jira/browse/SPARK-16307?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Yanbo Liang updated SPARK-16307:
--------------------------------
    Assignee: Manoj Kumar

> 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
>            Assignee: 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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