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Posted to issues@spark.apache.org by "Xiangrui Meng (JIRA)" <ji...@apache.org> on 2014/11/26 08:41:14 UTC
[jira] [Reopened] (SPARK-4583) GradientBoostedTrees error logging
should use loss being minimized
[ https://issues.apache.org/jira/browse/SPARK-4583?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Xiangrui Meng reopened SPARK-4583:
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> GradientBoostedTrees error logging should use loss being minimized
> ------------------------------------------------------------------
>
> Key: SPARK-4583
> URL: https://issues.apache.org/jira/browse/SPARK-4583
> Project: Spark
> Issue Type: Improvement
> Components: MLlib
> Affects Versions: 1.2.0
> Reporter: Joseph K. Bradley
> Assignee: Joseph K. Bradley
> Priority: Minor
>
> Currently, the LogLoss used by GradientBoostedTrees has 2 issues:
> * the gradient (and therefore loss) does not match that used by Friedman (1999)
> * the error computation uses 0/1 accuracy, not log loss
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