Hi,
I want to add a dashed vertical line to a number of xyplots. Here is a simple script of the type of plot I have but then I want to add a reference line to 1995 on each of the panels. I have tried panel.abline and other suggestions on the forum but can't get it to work. plot<-rep(letters[1:3],each=10) year<-rep(1991:2000,times=3) matter<-rep(seq(2,6.5,0.5),times=3) xyplot(matter~year|plot,type="l") Cheers, Chris -- View this message in context: http://www.nabble.com/adding-a-reference-line-to-an-xyplot-tp22117545p22117545.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.
