We work with confusion matrices here, but have opted to do the analysis in a
statistics package (Splus). I take r.stats -cz map=... output into Splus and
have written scripts to produce the matrix and calculate both kappa and
weighted kappa. I can send those to you if interested. Contact me directly at:
saraw@aro.nps.gov
Sara Wesser
National Park Service
907/257-2557