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From "yuhao yang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SPARK-9062) Change output type of Tokenizer to Array(String, true)
Date Wed, 15 Jul 2015 06:39:04 GMT
yuhao yang created SPARK-9062:
---------------------------------

             Summary: Change output type of Tokenizer to Array(String, true)
                 Key: SPARK-9062
                 URL: https://issues.apache.org/jira/browse/SPARK-9062
             Project: Spark
          Issue Type: Improvement
          Components: ML
            Reporter: yuhao yang
            Priority: Minor


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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