I use range( 0, y ) rather than c(0, max(y)), that way if there are any y values less than 0, the limits still include them (and it is slightly shorter :-).
This also extends to cases where you may know that you will be adding additional data using points or lines, so you can do ylim=range(0, y1, y2, y3) and it will give enough room to add the other y variables in latter. Hope this helps, -- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare greg.s...@imail.org 801.408.8111 > -----Original Message----- > From: r-devel-boun...@r-project.org [mailto:r-devel-boun...@r- > project.org] On Behalf Of Marc Schwartz > Sent: Thursday, February 05, 2009 1:57 PM > To: ted.hard...@manchester.ac.uk > Cc: R-Devel > Subject: Re: [Rd] "open-ended" plot limits? > > on 02/05/2009 02:48 PM (Ted Harding) wrote: > > Hi Folks, > > Maybe I've missed it already being available somehow, > > but if the following isn't available I'd like to suggest it. > > > > If you're happy to let plot() choose its own limits, > > then of course plot(x,y) will do it. > > > > If you know what limits you want, then > > plot(x,y,xlim=c(x0,x1),ylim(y0,y1) > > will do it. > > > > But sometimes one would like to > > a) make sure that (e.g.) the y-axis has a lower limit (say) 0 > > b) let plot() choose the upper limit. > > > > In that case, something like > > > > plot(x,y,ylim=c(0,NA)) > > > > would be a natural way of specifying it. But of course that > > does not work. > > > > I would like to suggest that this possibility should be available. > > What do people think? > > > > Best wishes, > > Ted. > > Ted, > > Unless I am mistaken in what you are looking for: > > plot(x, y, ylim = c(0, max(y))) > > would seem do what you want. If otherwise unspecified, plot() uses > range(y) to define 'ylim'. > > HTH, > > Marc Schwartz > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel
