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https://issues.apache.org/jira/browse/SPARK-20498?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16026022#comment-16026022
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Apache Spark commented on SPARK-20498:
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User 'facaiy' has created a pull request for this issue:
https://github.com/apache/spark/pull/18120

> RandomForestRegressionModel should expose getMaxDepth in PySpark
> ----------------------------------------------------------------
>
>                 Key: SPARK-20498
>                 URL: https://issues.apache.org/jira/browse/SPARK-20498
>             Project: Spark
>          Issue Type: Improvement
>          Components: ML, PySpark
>    Affects Versions: 2.1.0
>            Reporter: Nick Lothian
>            Assignee: Xin Ren
>            Priority: Minor
>
> Currently it isn't clear hot to get the max depth of a 
> RandomForestRegressionModel (eg, after doing a grid search)
> It is possible to call
> {{regressor._java_obj.getMaxDepth()}} 
> but most other decision trees allow
> {{regressor.getMaxDepth()}} 



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