On Tue, 30 Aug 2011, David Winsemius wrote:
That does look more workable. You might consider changing the dates with: chemadata$samp_date <- as.Date(as.character(chemdata$sample_date) )
David, I was thinking that I needed to do this. Thank you. It's now done. Good progress for the first afternoon applying R to my own data. Rich ______________________________________________ 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.
