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Posted to issues@spark.apache.org by "Joseph K. Bradley (JIRA)" <ji...@apache.org> on 2016/03/25 18:13:25 UTC

[jira] [Created] (SPARK-14159) StringIndexerModel sets output column metadata incorrectly

Joseph K. Bradley created SPARK-14159:
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             Summary: 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


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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