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Posted to dev@mahout.apache.org by "Grant Ingersoll (Assigned) (JIRA)" <ji...@apache.org> on 2012/01/06 15:59:39 UTC

[jira] [Assigned] (MAHOUT-941) Strip quoted text from emails and add statistics to ConfusionMatrix

     [ https://issues.apache.org/jira/browse/MAHOUT-941?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Grant Ingersoll reassigned MAHOUT-941:
--------------------------------------

    Assignee: Grant Ingersoll
    
> Strip quoted text from emails and add statistics to ConfusionMatrix
> -------------------------------------------------------------------
>
>                 Key: MAHOUT-941
>                 URL: https://issues.apache.org/jira/browse/MAHOUT-941
>             Project: Mahout
>          Issue Type: Improvement
>          Components: Classification
>            Reporter: Lance Norskog
>            Assignee: Grant Ingersoll
>            Priority: Minor
>             Fix For: 0.6
>
>         Attachments: Bayes.zip, MAHOUT-941.patch, SGD.zip
>
>
> This patch does 2 things:
> # Add an feature to org.apache.mahout.text.SequenceFilesFromMailArchives that removes quoted text from email bodies. This is important because it avoid spamming the term dictionary with repeated text, especially in long email threads.
> ** The feature defaults to true. Add "--quoted" to the command line to keep the quoted lines.
> # Adds some dubious overall measurements to the ConfusionMatrix. 
> ** Kappa - a standard measurement. 
> *** How different is this confidence matrix from random numbers? 0.0 is the same, 1.0 is completely different.
> *** I think this is an "unweighted" kappa. 
> ** "Success" - a homegrown formula attempting to represent the correctness of each box. Probably bogus. 
> *** The standard deviation shows the distance between the success of each producer->consumer box.

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