Strip quoted text from emails and add statistics to ConfusionMatrix
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Key: MAHOUT-941
URL: https://issues.apache.org/jira/browse/MAHOUT-941
Project: Mahout
Issue Type: Improvement
Components: Classification
Reporter: Lance Norskog
Priority: Minor
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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