Hi all,
Since I could not attach a file to my original e-mail request, for those who want to look at an example of a data file I am working with, please use this link: http://dl.dropbox.com/u/4637975/exampledata.csv Thanks again, Johnny. ______________________________________________ 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.