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Posted to issues@spark.apache.org by "Sumit Chawla (JIRA)" <ji...@apache.org> on 2015/09/25 19:29:04 UTC

[jira] [Created] (SPARK-10835) Change Output of NGram to Array(String, True)

Sumit Chawla created SPARK-10835:
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             Summary: Change Output of NGram to Array(String, True)
                 Key: SPARK-10835
                 URL: https://issues.apache.org/jira/browse/SPARK-10835
             Project: Spark
          Issue Type: Improvement
          Components: ML
            Reporter: Sumit Chawla
            Assignee: yuhao yang
            Priority: Minor
             Fix For: 1.5.0


Currently output type of Tokenizer is Array(String, false), which is not compatible with Word2Vec and Other transformers since their input type is Array(String, true). Seq[String] in udf will be treated as Array(String, true) by default. 

I'm also thinking for Nullable columns, maybe tokenizer should return Array(null) for null value in the input.



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