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Posted to issues@spark.apache.org by "Nick Pentreath (JIRA)" <ji...@apache.org> on 2016/08/22 18:08:21 UTC
[jira] [Commented] (SPARK-13030) Change OneHotEncoder to Estimator
[ https://issues.apache.org/jira/browse/SPARK-13030?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15431319#comment-15431319 ]
Nick Pentreath commented on SPARK-13030:
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Yes I also agree OHE needs to be an {{Estimator}} in order to actually be usable in a pipeline. Alternative is to have a "stateful" transformer - but IMO estimator makes more sense here.
The issue we face is that OHE in 2.0 is locked down and we can't break things now - since it's no longer {{Experimental}}.
> Change OneHotEncoder to Estimator
> ---------------------------------
>
> Key: SPARK-13030
> URL: https://issues.apache.org/jira/browse/SPARK-13030
> Project: Spark
> Issue Type: Improvement
> Components: ML
> Affects Versions: 1.6.0
> Reporter: Wojciech Jurczyk
>
> OneHotEncoder should be an Estimator, just like in scikit-learn (http://scikit-learn.org/stable/modules/generated/sklearn.preprocessing.OneHotEncoder.html).
> In its current form, it is impossible to use when number of categories is different between training dataset and test dataset.
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