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Posted to issues@spark.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2015/06/19 15:59:00 UTC

[jira] [Assigned] (SPARK-8468) Cross-validation with RegressionEvaluator prefers higher RMSE

     [ https://issues.apache.org/jira/browse/SPARK-8468?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-8468:
-----------------------------------

    Assignee: Apache Spark

> 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
>            Assignee: Apache Spark
>
> 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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