cssdiff(1)                          CRM114                          cssdiff(1)



  NAME
      cssdiff - generate a difference summary of two .css files

  SYNOPSIS
      cssdiff [cssfile 1] [cssfile 2]

  DESCRIPTION
      cssdiff is a special-purpose utility to measure the distance between the
      classes represented by cssfile1 and cssfile2.  The summary result output
      tells  how  many  features were in each of the .css files, how many fea-
      tures appeared in both (balanced overlap), how  many  features  appeared
      only  in  one (or unbalanced overlaps), and how often the feature set of
      one .css file strictly dominated the feature set of another  .css  file.
      This  set of metrics provides an intuitive way to determine the similar-
      ity (or dissimilarity) of two classes represented as .css  files.   When
      using the CRM114 spamfilter, it can be used to find out how easy it will
      be for CRM114 to differentiate spam from nonspam with your  .css  files.
      cssdiff prints a report like e.g.

         Sparse spectra file spam.css has 1048577 bins total
         Sparse spectra file nonspam.css has 1048577 bins total

         File 1 total features            :      1605968
         File 2 total features            :      1045152

         Similarities between files       :       142039
         Differences between files        :      1279964

         File 1 dominates file 2          :      1463929
         File 2 dominates file 1          :       903113

      Note  that  in this case there's a big difference between the two files;
      in this case there are about 10 times as many  differences  between  the
      two files as there are similarities.

  OPTIONS
      There are no options to cssdiff.

  SHORTCOMINGS
      Note  that cssdiff as of version 20040816 is NOT capable of dealing with
      the CRM114 Winnow classifier's floating-point .cow files. Worse, cssdiff
      is  unaware of it's shortcomings, and will try anyway. The only recourse
      is to be aware of this issue and not use cssdiff  on  Winnow  classifier
      floating point .cow format files.

  HOMEPAGE AND REPORTING BUGS
      http://crm114.sourceforge.net/

  VERSION
      This  manpage:  $Id: cssdiff.azm,v 1.5 2004/08/19 09:06:44 vanbaal Exp $
      This  manpage  describes  cssdiff  as  shipped   with   crm114   version
      20040816.BlameClockworkOrange.

  AUTHOR
      William  S. Yerazunis. Manpage typesetting by Joost van Baal and Shalen-
      dra Chhabra

  COPYRIGHT
      Copyright (C) 2001, 2002, 2003, 2004 William S. Yerazunis.  This is free
      software,  copyrighted  under  the FSF's GPL.  There is NO warranty; not
      even for MERCHANTABILITY or FITNESS FOR A PARTICULAR  PURPOSE.  See  the
      file COPYING for more details.

  SEE ALSO
      cssutil(1), cssmerge(1), crm(1), crm114(1), cssmerge(1)



  cssdiff 20040816.BlameClockworkOra19eAugt2004                       cssdiff(1)