bgweber commented on issue #23751: [SPARK-26852][PYTHON] Add absolute transform to CrossValidator URL: https://github.com/apache/spark/pull/23751#issuecomment-462886535 @holdenk I'll put together a test case. @srowen This likely only happens when you want to average the error over multiple predictions. I provided an example of a custom evaluator where this is useful in the Jira ticket: https://issues.apache.org/jira/browse/SPARK-26852 However, I acknowledge this might be too specific of a use case.
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