If what is desired is a plot of conditional quantiles of y given x, then loess plots of y on x binned on y is really not a good strategy.
You might try something like this: library(quantreg) x <- (0:1000/1000)*2*pi y <- sin(2*x) + rnorm(1001)/5 plot(x,y,pch =".") plot(rqss(y ~ qss(x)),col="red") plot(rqss(y ~ qss(x),tau=.1),col="red") plot(rqss(y ~ qss(x),tau=.9),col="red") url: www.econ.uiuc.edu/~roger Roger Koenker email [EMAIL PROTECTED] Department of Economics vox: 217-333-4558 University of Illinois fax: 217-244-6678 Champaign, IL 61820 On Oct 2, 2007, at 1:57 PM, Bert Gunter wrote: > > > Folks: > > I found the references in the previous replies to this vexing data > visualization issue to be quite interesting and useful. I think it > fair to > say that there is no single "best" way to do this -- it all depends > on what > you need to learn , and probably several alternative displays will be > necessary to get the important information the data have to convey. > However,as always, this issue has been considered before, and it > may be > worthwhile to at least consider an already available "standard" > approach" > using shingles and a trellis-type plot. ?xyplot and ?shingle should > get you > started (you probably want to shingle or bin on quantiles of y). The > canonical reference is Bill Cleveland's VISUALIZING DATA (see > "coplots"). > > > Bert Gunter > Genentech Nonclinical Statistics > > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > project.org] On > Behalf Of Jim Porzak > Sent: Tuesday, October 02, 2007 11:19 AM > To: Karin Lagesen > Cc: r-help@r-project.org > Subject: Re: [R] "continuous" boxplot? > > Karin, > > I like to use bagplots in these cases where there are a lot of > cases and > scatter plots become one big smudge. > > See > http://www.wiwi.uni-bielefeld.de/~wolf/software/R-wtools/bagplot/ > bagplot.pdf > > And some further examples on slides 36 - 39 of > http://www.porzak.com/JimArchive/ > JimPorzak_CIwithR_useR2006_tutorial.pdf > > -- > HTH, > Jim Porzak > Responsys, Inc. > San Francisco, CA > http://www.linkedin.com/in/jimporzak > > On 10/1/07, Karin Lagesen <[EMAIL PROTECTED]> wrote: >> >> >> >> I have two vectors x and y, which I would like to plot against each >> other. I am also displaying other data in this plot. However, I have >> about 1 million points to plot, and just plotting them x againt y is >> not very informative. What I'd like to do is to do sort of a >> continuous box plot. >> >> My x values goes from -1 to 1 and my y values from 0 to 1, so I4d >> like >> to plot the median and quantiles, and possibly also all of the >> outliers somehow. Are there any facilities in R for doing something >> like this, or would I need to do this the hard coded way? >> >> Thankyou very much for your help! >> >> Karin >> -- >> Karin Lagesen, PhD student >> [EMAIL PROTECTED] >> http://folk.uio.no/karinlag >> >> ______________________________________________ >> 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. ______________________________________________ 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.
