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Posted to issues@spark.apache.org by "Joseph K. Bradley (JIRA)" <ji...@apache.org> on 2016/11/02 00:01:02 UTC
[jira] [Updated] (SPARK-14659) OneHotEncoder support drop first
category alphabetically in the encoded vector
[ https://issues.apache.org/jira/browse/SPARK-14659?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Joseph K. Bradley updated SPARK-14659:
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Target Version/s: 2.2.0 (was: 2.1.0)
> OneHotEncoder support drop first category alphabetically in the encoded vector
> -------------------------------------------------------------------------------
>
> Key: SPARK-14659
> URL: https://issues.apache.org/jira/browse/SPARK-14659
> Project: Spark
> Issue Type: Improvement
> Components: ML
> Reporter: Yanbo Liang
>
> R formula drop the first category alphabetically when encode string/category feature. Spark RFormula use OneHotEncoder to encode string/category feature into vector, but only supporting "dropLast" by string/category frequencies. This will cause SparkR produce different models compared with native R.
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