On Mon, 28 Jun 2004, Spencer Graves wrote: > Another alternative might follow an example in Venables and Ripley > (2002, p. 76-77) Modern Applied Statistics with S (Springer): > > topo.loess <- loess(z~x*y, topo, degree=2, span=0.25) > topo.mar <- list(x=seq(0, 6.5, .2), y=seq(0, 6.5, .2)) > topo.lo <- predict(topo.loess, expand.grid(topo.mar)) > par(pty="s") > contour(topo.mar$x, topo.mar$y, topo.lo, > xlab="", ylab="", levels=seq(700, 1000, 25), cex=0.7) > points(topo$x, topo$y) > par(pty="m") > > They also provide a solution using contourplot. However, in R > 1.9.1 alpha, I got an error on that, 'couldn't find function "mat2tr"'; > it should be fairly easy to work around that error if it has not already > been fixed in R 1.9.1, which I have not yet installed.
You do need to consult the R scripts for R differences -- MASS4 p.12. -- Brian D. Ripley, [EMAIL PROTECTED] Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/ University of Oxford, Tel: +44 1865 272861 (self) 1 South Parks Road, +44 1865 272860 (secr) Oxford OX1 3TG, UK Fax: +44 1865 272595 ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
