Thank you Gustaf for your help! It worked perfectly. Now I just need to figure out how you did it. Petr, thank you for assisting me, but I could not get your approach to work.
Mike ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
