Probably the easiest way is to use the "wireframe" function in the lattice package. The second example in the help shows 2 surfaces (you do need to combine the data into a single data frame).
If you really want to use the "persp" function, then you could create the first plot, then call "par(new=TRUE)" and then do the 2nd plot, but that would take a lot of thinking to get the axes and scales to line up properly and make it look good. Hope this helps, -- Gregory (Greg) L. Snow Ph.D. Statistical Data Center Intermountain Healthcare [EMAIL PROTECTED] (801) 408-8111 > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Roland Rau > Sent: Friday, February 09, 2007 9:01 AM > To: r-help > Subject: [R] two perspective plots in in plot > > Dear all, > > I would like to put two perspective plots into one plot. The > help page for ?persp shows how one can add points and lines > but not another perspective plot. > > data(volcano) > z <- 2 * volcano # Exaggerate the relief > x <- 10 * (1:nrow(z)) # 10 meter spacing (S to N) > y <- 10 * (1:ncol(z)) # 10 meter spacing (E to W) > ## Don't draw the grid lines : border = NA persp(x, y, z, > theta = 135, phi = 30, col = "green3", scale = FALSE, > ltheta = -120, shade = 0.75, border = NA, box = FALSE) > > and now I would like to include another surface. I was hoping > for a possibility like add=TRUE such as in contour: > > persp(x, y, z+10, theta = 135, phi = 30, col = "red", add=TRUE) > > Can someone point out to me how it can be accomplished (maybe > a function in another package)? > > Thank you very much, > Roland > > [[alternative HTML version deleted]] > > ______________________________________________ > [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 > and provide commented, minimal, self-contained, reproducible code. > ______________________________________________ [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 and provide commented, minimal, self-contained, reproducible code.
