Jon, You could create new variables with the combined levels just for the purpose of plotting. Assume I have data.frame bpt str(bpt) 'data.frame': 12 obs. of 2 variables: $ V1: Factor w/ 3 levels "low","med","high": 1 1 1 1 2 2 2 2 3 3 ... $ V2: Factor w/ 6 levels "1","2","3","4",..: 1 1 2 2 3 3 4 4 5 5 ...
bpt$V3 <- factor(bpt$V1,c(levels(bpt$V1),levels(bpt$V2))) bpt$V4 <- factor(bpt$V2,c(levels(bpt$V1),levels(bpt$V2))) with(bpt,barplot(cbind(table(V3),table(V4)))) Hope this helps Elai On Thu, Mar 1, 2012 at 7:19 AM, jon waterhouse <jonwaterho...@gov.nl.ca> wrote: > If I have two factors, v1 and v2 and I want to have a stacked bar graph of > the two variables side by side I could do > > barplot(cbind(table(v1),table(v2))) > > if v1 and v2 have the same number of categories. > > If they don't have the same number of categories this won't work. > > I'm sure there's a simple solution? > > Thanks, > > Jon > > -- > View this message in context: > http://r.789695.n4.nabble.com/barplots-of-several-variables-with-different-number-of-categories-tp4435092p4435092.html > Sent from the R help mailing list archive at Nabble.com. > > ______________________________________________ > 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. ______________________________________________ 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.
