Also note that boxplot.n in the gplots library (part of the gregmisc bundle) automatically adds the number of observations.
-Greg > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] Behalf Of Patrick > Drechsler > Sent: Wednesday, September 29, 2004 1:47 PM > To: [EMAIL PROTECTED] > Subject: Re: [R] displaying sample size in boxplots > > > > Martin Maechler wrote on 29 Sep 2004 17:11:13 MET: > > >>>>>> "Roger" == Roger Bivand <[EMAIL PROTECTED]> > >>>>>> on Wed, 29 Sep 2004 15:09:17 +0200 (CEST) writes: > [snip] > > > Roger> Perhaps use the names= argument (width can help too): > > ^^^^^^^^^^^^^^^^^^ > > Indeed! > > And that's why -- "in the good ol' times" when the box plot > was invented > > and enhanced, the inventors thought about it. > > For that reason there's the 'varwidth = TRUE/FALSE' argument > > in boxplot() > > > > Note from help(boxplot) however that the inventors thought > > it wiser to make the width proportional to the SQRT of the > > sample size rather than the sample.size itself, i.e., > > 'varwidth = TRUE' and your proposal are not equivalent. > > > > >> boxplot(expend~stature, width=sample.size/length(expend), > > >> + names=paste(levels(stature), ", N=", > sample.size, sep="")) > > > > Here are the current proposals [for cut & paste]: > > > > library(ISwR) > > data(energy) > > attach(energy) > > > > ## 1 > > boxplot(expend~stature) > > sample.size <- tapply(expend, stature, length) > > ss.ch <- paste("N=", sample.size, sep="") > > mtext(ss.ch, at=1:length(unique(stature)), line=2, side=1) > > > > ## 2 (Roger) > > boxplot(expend~stature, width=sample.size/length(expend), > > names=paste(levels(stature), ", N=", sample.size, sep="")) > > > > ## 3 (Roger + Martin): > > boxplot(expend ~ stature, varwidth= TRUE, > > names=paste(levels(stature), ", N=", sample.size, sep="")) > > Thanks for the explanation and the nice summary Martin! I can see > the point you're making about varwidth. I've read that part in > the documentation before but I have to admit that up to now I > didn't see the purpose of this parameter. Although there are > situations were I prefer to see the number in print somewhere on > the plot which I can now easily accomplish with `names'. > > Also thanks to Stephano for the pointer to the r-newsletter > article and to Don for showing me how one implements user > defined functions! > > Cheers > > Patrick > -- > For animals, the entire universe has been neatly divided into things > to (a) mate with, (b) eat, (c) run away from, and (d) rocks. > -- (Terry Pratchett, Equal Rites) > > ______________________________________________ > [EMAIL PROTECTED] mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html > LEGAL NOTICE\ Unless expressly stated otherwise, this messag...{{dropped}} ______________________________________________ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
