I played around with this for a while with no success at all. I'd suggest posting the question on the ggplot2 newsgroup in Google Groups
John Kane Kingston ON Canada > -----Original Message----- > From: thorn.tha...@rdls.nestle.com > Sent: Tue, 3 Jul 2012 18:50:52 +0200 > To: r-help@r-project.org > Subject: [R] ggplot2: legend > > Dear all, > > I produced the following graph with ggplot which is almost fine, yet I > don't like that the legend for "Means" and "Observations" includes a > line, though no line is used in the plot for those two (the line for > "Overall Mean" on the other hand is wanted): > > library(ggplot2) > ddf <- data.frame(x = factor(rep(LETTERS[1:2], 5)), y = rnorm(10)) > p <- ggplot(ddf, aes(x = x, y = y)) > p + geom_point(aes(colour="Observations", shape="Observations")) + > stat_summary(aes(colour = "Means", shape ="Means"), > fun.y = mean, fun.ymin = min, fun.ymax = max, > geom = "point") + > geom_hline(aes(yintercept = mean(y), linetype = "Overall Mean"), > show_guide = TRUE) > > I tried to map the linetype in geom_point (and stat_summary) to NULL and > I tried to set it to "blank" but neither worked. > > Is it furthermore possible to combine the two legends? My preferred plot > would have two symbols with different colours and shapes for "Means" and > "Observations" (but no line) and directly below that a line for "Overall > Mean" (that is all the three items in one legend)? For that I tried to > assign the same names to the legends but this did not work either. > > So any help would be highly appreciated. > > Kind Regards, > > Thorn Thaler > Mathematician > > Applied Mathematics > Nestec Ltd, > Nestlé Research Center > PO Box 44 > CH-1000 Lausanne 26 > Phone: +41 21 785 8220 > Fax: +41 21 785 9486 > > ______________________________________________ > 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. ____________________________________________________________ FREE ONLINE PHOTOSHARING - Share your photos online with your friends and family! Visit http://www.inbox.com/photosharing to find out more! ______________________________________________ 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.
