In the example R script below, horizontal gray gridlines are drawn at y coordinates where the points are drawn with the code: panel.abline(h=y, v=xScale, col.line="gray")
How do I change this so that the horizontal gray gridlines are drawn at y coordinates where the y labels are drawn? The challenge is that each panel has different y-ranges (in my real example the y-ranges and y-intervals are even more different). For example, I wish I could use the yScale list as the h parameter in abline, but it does not work with a list. Thanks for any help. Rene library(lattice) Subj <- rep(1:4,each=3) Time <- rep(1:3,4) + 0.1 Conc <- (1:12) + 0.1 df <- data.frame(Subj,Time,Conc) xScale <- 1:3 yScale <- list(1:3,4:6,7:9,10:12) xyplot(Conc ~ Time | Subj, data = df, layout = c(2,2), type="b", scales=list( x=list(at=xScale), y=list(at=yScale,relation="free") ), panel = function(x,y,...) { panel.abline(h=y, v=xScale, col.line="gray") panel.xyplot(x,y,...) } ) ______________________________________________ R-help@stat.math.ethz.ch 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.