[jira] [Assigned] (SPARK-8774) Add R model formula with basic support as a transformer

["Xiangrui Meng (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-8774?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Xiangrui Meng reassigned SPARK-8774:
------------------------------------

    Assignee: Xiangrui Meng

> Add R model formula with basic support as a transformer
> -------------------------------------------------------
>
>                 Key: SPARK-8774
>                 URL: https://issues.apache.org/jira/browse/SPARK-8774
>             Project: Spark
>          Issue Type: New Feature
>          Components: ML, SparkR
>            Reporter: Xiangrui Meng
>            Assignee: Xiangrui Meng
>
> To have better integration with SparkR, we can add a feature transformer to support R formula. A list of operators R supports can be find here: http://ww2.coastal.edu/kingw/statistics/R-tutorials/formulae.html
> The initial version should support "~", "+", and "." on numeric columns and we can expand it in the future.
> {code}
> val formula = new RModelFormula()
>   .setFormula("y ~ x + z")
> {code}
> The output should append two new columns: features and label.



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