There's a great tutorial online that helped me out a lot - Lattice and Other Graphics in R, by J H Maindonald at the Centre for Mathematics and Its Applications at Australian National University.
http://maths.anu.edu.au/~johnm/r-book/2edn/xtras/rgraphics.pdf I gave my lattice object a name, and then I was able to superimpose changes via the update fcn. I'm sure there are many other ways to do this, but this was very simple to follow and delivered results quickly. Fieldplots = xyplot(Hill.s.diversity ~ Year| Field, group=Management, layout=c(2,3), data=summer_pr_avg, auto.key=TRUE) Fieldplots update ( Fieldplots, main="Hill's evenness by Field, June 09-11", par.settings = simpleTheme (pch=c(1 ,3 ,4))) -- View this message in context: http://r.789695.n4.nabble.com/identifying-groups-in-xyplot-tp3922985p3923338.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ 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.
