I try to make a xyplot like the following: xyplot(y1+y2~id|groups, ...)
I also want to calculate cor(y1,y2) in each group, print it on each panel. Does anyone know how to write panel function for this? Thanks, Aimin ______________________________________________ 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.
