{"action":"created","comment":{"url":"https://api.github.com/repos/apache/spark/pulls/comments/35928626","id":35928626,"diff_hunk":"@@ -56,17 +56,26 @@ class OneHotEncoder(override val uid: String) extends Transformer\n     new BooleanParam(this, \"dropLast\", \"whether to drop the last category\")\n   setDefault(dropLast -> true)\n \n+  /**\n+   * Param for the output attr prefix. If not specified, a prefix will be automatically generated.\n+   * @group param\n+   */\n+  final val outputAttrPrefix: Param[String] 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[ML] Expose model coefficients with names in SparkR RFormula","user":{"login":"ericl","id":14922,"avatar_url":"https://avatars.githubusercontent.com/u/14922?v=3","gravatar_id":"","url":"https://api.github.com/users/ericl","html_url":"https://github.com/ericl","followers_url":"https://api.github.com/users/ericl/followers","following_url":"https://api.github.com/users/ericl/following{/other_user}","gists_url":"https://api.github.com/users/ericl/gists{/gist_id}","starred_url":"https://api.github.com/users/ericl/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/ericl/subscriptions","organizations_url":"https://api.github.com/users/ericl/orgs","repos_url":"https://api.github.com/users/ericl/repos","events_url":"https://api.github.com/users/ericl/events{/privacy}","received_events_url":"https://api.github.com/users/ericl/received_events","type":"User","site_admin":false},"body":"Preview:\r\n\r\n```\r\n> summary(m)\r\n            features coefficients\r\n1        (Intercept)    1.6765001\r\n2       Sepal_Length    0.3498801\r\n3 Species.versicolor   -0.9833885\r\n4  Species.virginica   -1.0075104\r\n\r\n```\r\n\r\nDesign doc from umbrella task: https://docs.google.com/document/d/10NZNSEurN2EdWM31uFYsgayIPfCFHiuIu3pCWrUmP_c/edit\r\n\r\ncc @mengxr 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