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Posted to dev@mahout.apache.org by "Lance Norskog (Updated) (JIRA)" <ji...@apache.org> on 2012/01/05 07:52:39 UTC
[jira] [Updated] (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 ]
Lance Norskog updated MAHOUT-941:
---------------------------------
Attachment: MAHOUT-941.patch
> 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
> Priority: Minor
> Attachments: MAHOUT-941.patch
>
>
> 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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