Thanks for all the useful information; use of 'c(...)' did the trick, although in future I'll try to hold the data in a more user-friendly setup.
I've now got a plot, but have two issues that I can't seem to resolve: 1, The ylab is overlapping the y-axis tick mark values. I've tried using oma and mar to adjust the outer and plot margins respectively, but this doesn't seem to 'detach' the overlapping text. 2. The x-axis currently has tick mark values of 2 to 12. How do change this to single-letter month labels? So far I've tried xlim=c("J","F","M",A","M"...) and names.arg=c("J","F","M"...), but these result in errors. Any suggestions would be much appreciated. Thanks again, Steve _________________________________________________________________ [[elided Hotmail spam]] ______________________________________________ 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.