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Posted to issues@spark.apache.org by "Xiangrui Meng (JIRA)" <ji...@apache.org> on 2016/03/26 00:00:26 UTC
[jira] [Resolved] (SPARK-14159) StringIndexerModel sets output
column metadata incorrectly
[ https://issues.apache.org/jira/browse/SPARK-14159?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Xiangrui Meng resolved SPARK-14159.
-----------------------------------
Resolution: Fixed
Fix Version/s: 2.0.0
Issue resolved by pull request 11965
[https://github.com/apache/spark/pull/11965]
> StringIndexerModel sets output column metadata incorrectly
> ----------------------------------------------------------
>
> Key: SPARK-14159
> URL: https://issues.apache.org/jira/browse/SPARK-14159
> Project: Spark
> Issue Type: Bug
> Components: ML
> Reporter: Joseph K. Bradley
> Assignee: Joseph K. Bradley
> Priority: Minor
> Fix For: 2.0.0
>
>
> StringIndexerModel.transform sets the output column metadata to use name inputCol. It should not. Fixing this causes a problem with the metadata produced by RFormula.
> Fix in RFormula: I added the StringIndexer columns to prefixesToRewrite, and I modified VectorAttributeRewriter to find and replace all "prefixes" since attributes collect multiple prefixes from StringIndexer + Interaction.
> Note that "prefixes" is no longer accurate since internal strings may be replaced.
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