Greg, Try this:
library (ggplot2) v1 <- c(1,2,3,3,4) v2 <- c(4,3,1,1,9) v3 <- c(3,5,7,2,9) gender <- c("m","f","m","f","f") d.data <- data.frame (v1, v2, v3, gender) d.data #library(reshape) #library(plyr) # These are already loaded by ggplot2, but for your reference: reshape provides melt(), plyr provides ddply(). d.data <- melt(d.data, id.var="gender") new.data <- ddply(d.data, .(gender, variable), summarize, means = mean(value)) plot <- ggplot(data=new.data, aes(variable, y=means)) + geom_bar(aes(fill=gender), stat="identity", position="dodge") + coord_flip() plot I took the numbers out because it's not easy to make them fit the dodged bars. Jonathan On Wed, Sep 1, 2010 at 9:15 AM, Waller Gregor (wall) <w...@zhaw.ch> wrote: > > hi there.. i got a problem with ggplot2. > > here my example: > > library (ggplot2) > > v1 <- c(1,2,3,3,4) > v2 <- c(4,3,1,1,9) > v3 <- c(3,5,7,2,9) > gender <- c("m","f","m","f","f") > > d.data <- data.frame (v1, v2, v3, gender) > d.data > > x <- names (d.data[1:3]) > y <- mean (d.data[1:3]) > > > pl <- ggplot (data=d.data, aes (x=x,y=y)) > pl <- pl + geom_bar() > pl <- pl + coord_flip() > pl <- pl + geom_text (aes(label=round(y,1)),vjust=0.5, > hjust=4,colour="white", size=7) > pl > > this gives me a nice barchart to compare the means of my variables > "v1","v2" and "v3". > my question: how do i have to proceed if i want this barchart splittet > by the variable "gender". > so i get two small bars for "v1", one for female and one for male, two > bars for "v2" etc. > i need them all in one chart. > > fill=gender, position="dodge" do not work... > > any ideas? > > thanks a lot > > greg > > ______________________________________________ > 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. > [[alternative HTML version deleted]] ______________________________________________ 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.