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https://issues.apache.org/jira/browse/SPARK-6901?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-6901:
-----------------------------------
Assignee: Apache Spark
> ParamGridBuilder.build with no grids should return an empty array
> -----------------------------------------------------------------
>
> Key: SPARK-6901
> URL: https://issues.apache.org/jira/browse/SPARK-6901
> Project: Spark
> Issue Type: Bug
> Components: ML
> Affects Versions: 1.3.0
> Reporter: Peter Rudenko
> Assignee: Apache Spark
> Priority: Minor
> Fix For: 1.4.0
>
>
> ParamGridBuilder.build with no grids returns array with an empty param map.
> {code}
> (new ParamGridBuilder).build().size == 1
> {code}
> I have a logic if ParamGridBuilder is empty - then not use CrossValidator. It
> confuses because if the ParamGridBuilder has one grid it will also return an
> array of size 1:
> {code}
> (new ParamGridBuilder).addGrid(lr.regParam, Array(0.1)).build().size == 1
> {code}
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