GitHub user hhbyyh opened a pull request:
https://github.com/apache/spark/pull/9092
[SPARK-11069] [ML] Add RegexTokenizer option to convert to lowercase
jira: https://issues.apache.org/jira/browse/SPARK-11069
quotes from jira:
Tokenizer converts strings to lowercase automatically, but RegexTokenizer
does not. It would be nice to add an option to RegexTokenizer to convert to
lowercase. Proposal:
call the Boolean Param "toLowercase"
set default to false (so behavior does not change)
Actually sklearn converts to lowercase before tokenizing too
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/hhbyyh/spark tokenLower
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/9092.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #9092
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commit ce09ef532f2ec633e508840097fd0ac1b5285284
Author: Yuhao Yang <hhb...@gmail.com>
Date: 2015-10-13T07:14:55Z
add tolowercase to regexTokenizer
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