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From "Dave Byrne (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAHOUT-962) minDF and maxDFPercent filtering doesnt get applied when output weight is tf in SpareVecorsFromSequenceFile
Date Thu, 20 Sep 2012 20:49:08 GMT

     [ https://issues.apache.org/jira/browse/MAHOUT-962?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Dave Byrne updated MAHOUT-962:
------------------------------

    Attachment: mahout_962.patch

patch to apply minDF and MaxDFPercent
                
> minDF and maxDFPercent filtering doesnt get applied when output weight is tf in SpareVecorsFromSequenceFile
> -----------------------------------------------------------------------------------------------------------
>
>                 Key: MAHOUT-962
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-962
>             Project: Mahout
>          Issue Type: Bug
>          Components: Clustering
>    Affects Versions: 0.6, 0.7, 0.8
>            Reporter: John Conwell
>            Priority: Minor
>              Labels: patch
>             Fix For: 0.8
>
>         Attachments: mahout_962.patch
>
>
> This is similar to the same reasoning behind the fix for MAHOUT-957.  The desired output
is term frequency vectors, but I want terms filtered by their min and max DF values. This
might be valid in LDA, where tf vectors is desired for input, but filtering out the maxDFPercent
is also useful.
> Currently minDF and maxDFPercent are only used when calculating tfidf, and the original
tv vectors are not updated to represent the term filtering.

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