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https://issues.apache.org/jira/browse/SPARK-13030?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Joseph K. Bradley resolved SPARK-13030.
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Resolution: Fixed
Fix Version/s: 2.3.0
Resolved by https://github.com/apache/spark/pull/19527
> 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
> Assignee: Liang-Chi Hsieh
> Fix For: 2.3.0
>
>
> 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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