Tom: You can do this with ggplot2. The code below puts 95% CI,a smooth line and the mean(blue point)on the same plot. Felipe
library(ggplot2) r <- ggplot(ToothGrowth, aes(y=len, x=factor(dose))) r$background.fill = "cornsilk" r + geom_boxplot(aes(colour=supp)) + stat_summary(aes(group=supp),fun="mean_cl_normal",colour="red",geom="smooth",linetype=3,size=1) + stat_summary(aes(group=supp),fun="mean_cl_normal",colour="blue",geom="point",size=4) grid.gedit("label", gp=gpar(fontsize=10, col="red")) # color the axis labels Felipe D. Carrillo Fishery Biologist US Fish & Wildlife Service California, USA ____________________________________________________________________________________ Be a better friend, newshound, and ______________________________________________ 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.