Marc & Eric, Thanks so much for the help. That is exactly what I was looking for.
I should have mentioned that I don't really like this plot, but I'm writing an explanation of the Grammar of Graphics concept. A very nice example of that is that a single stacked bar chart converts to a pie chart when you change from Cartesian to polar coordinates. And yes, that may well be going from bad to worse! Thanks! Bob ========================================================= Bob Muenchen (pronounced Min'-chen), Manager Statistical Consulting Center U of TN Office of Information Technology 200 Stokely Management Center, Knoxville, TN 37996-0520 Voice: (865) 974-5230 FAX: (865) 974-4810 Email: [EMAIL PROTECTED] Web: http://oit.utk.edu/scc, News: http://listserv.utk.edu/archives/statnews.html ========================================================= > -----Original Message----- > From: Marc Schwartz [mailto:[EMAIL PROTECTED] > Sent: Thursday, January 24, 2008 11:32 AM > To: Muenchen, Robert A (Bob) > Cc: [EMAIL PROTECTED] > Subject: Re: [R] Barplot w/ single stacked bar > > Muenchen, Robert A (Bob) wrote: > > Hi All, > > > > I can get the barplot function to do many types of plots, stacked or > > otherwise. However, I cannot get it to do a *single* stacked bar. > I've > > searched several books & listserv archives to no avail. I suspect I'm > > missing the obvious from the help file! > > > > I can reach my goal in ggplot2, although the relative heights of the > > bar's pieces don't seem quite right (it does generate a warning): > > > > library(ggplot2) > > x<-factor(1) > > y<-factor( c("Male","Male","Female") ) > > mydata <- data.frame(x,y) > > rm(x,y) > > mydata > > > > #These are close to my goal: > > qplot( x, y, fill=y, geom="bar", data=mydata) > > > > # or > > ggplot(mydata, aes(x=x, y=y, fill=y)) + geom_bar() > > > > # But this places the bars beside each other rather than stack them. > > barplot( table(mydata$y), beside=FALSE) > > > > Thanks! > > Bob > > Bob, > > Try this: > > barplot(as.matrix(table(mydata$y)), beside = FALSE) > > Conceptually, for a stacked bar, each bar is a column in a matrix. The > components in a stacked bar are the row values in the column. > > Thus, you need to create a single column matrix from your table. > > One might question the value of such a plot however, if the intent is > to > provide a visual representation of the difference in counts/proportions > between two groups. A side-by-side barplot or a dotchart would seem to > be better here. > > HTH, > > Marc Schwartz ______________________________________________ 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.
