spark-reviews mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From jkbradley <>
Subject [GitHub] spark pull request: [Spark-7446][MLLIB] Add inverse transform for ...
Date Mon, 27 Jul 2015 20:23:25 GMT
Github user jkbradley commented on a diff in the pull request:
    --- Diff: mllib/src/main/scala/org/apache/spark/ml/feature/StringIndexer.scala ---
    @@ -151,4 +167,64 @@ class StringIndexerModel private[ml] (
         val copied = new StringIndexerModel(uid, labels)
         copyValues(copied, extra)
    +  /**
    +   * Return a model to perform the inverse transformation.
    +   * Note: by default we keep the original columns during this transformation
    +   * so the invert should only be needed if you do something beyond simply
    +   * applying the original transformation.
    +   */
    +  def invert(): StringIndexerInvertModel = {
    --- End diff --
    We should force the user to specify an output column here.  The default behavior will
cause failures since the inverse-indexed column will already exist.

If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at or file a JIRA ticket
with INFRA.

To unsubscribe, e-mail:
For additional commands, e-mail:

View raw message