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From "Sean Owen (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-18374) Incorrect words in StopWords/english.txt
Date Tue, 06 Dec 2016 21:13:59 GMT

     [ https://issues.apache.org/jira/browse/SPARK-18374?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sean Owen updated SPARK-18374:
------------------------------
    Priority: Minor  (was: Major)

> Incorrect words in StopWords/english.txt
> ----------------------------------------
>
>                 Key: SPARK-18374
>                 URL: https://issues.apache.org/jira/browse/SPARK-18374
>             Project: Spark
>          Issue Type: Bug
>          Components: ML
>    Affects Versions: 2.0.1
>            Reporter: nirav patel
>            Assignee: yuhao yang
>            Priority: Minor
>              Labels: releasenotes
>             Fix For: 2.2.0
>
>
> I was just double checking english.txt for list of stopwords as I felt it was taking
out valid tokens like 'won'. I think issue is english.txt list is missing apostrophe character
and all character after apostrophe. So "won't" becam "won" in that list; "wouldn't" is "wouldn"
.
> Here are some incorrect tokens in this list:
> won
> wouldn
> ma
> mightn
> mustn
> needn
> shan
> shouldn
> wasn
> weren
> I think ideal list should have both style. i.e. won't and wont both should be part of
english.txt as some tokenizer might remove special characters. But 'won' is obviously shouldn't
be in this list.
> Here's list of snowball english stop words:
> http://snowball.tartarus.org/algorithms/english/stop.txt



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