[jira] [Closed] (SPARK-4875) Separate Transformer, Estimator params

["Joseph K. Bradley (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-4875?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Joseph K. Bradley closed SPARK-4875.
------------------------------------
    Resolution: Duplicate

> Separate Transformer, Estimator params
> --------------------------------------
>
>                 Key: SPARK-4875
>                 URL: https://issues.apache.org/jira/browse/SPARK-4875
>             Project: Spark
>          Issue Type: Improvement
>          Components: ML
>    Affects Versions: 1.2.0
>            Reporter: Joseph K. Bradley
>            Priority: Minor
>
> Currently, in spark.ml, an Estimator and its Model (Transformer) both use the same set of parameters.  (E.g., LogisticRegression)  The problem is that some Estimator parameters are not relevant for Transformers, so it is non-sensical to include them in the Transformers.
> Proposal: When a parameter is only relevant to the Estimator, only include it in the Estimator.  In these cases, if there is a separate parameter trait (e.g., LogisticRegressionParams), that trait should be separated into a model params trait and an estimator params trait which inherits from the model params:
> {code}
> trait LogisticRegressionModelParams
> trait LogisticRegressionParams extends LogisticRegressionModelParams
> {code}
> In cases where the 2 classes use the same set of parameters, then they may share the same params trait.



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