On Sun, Feb 27, 2011 at 1:29 AM, James Platt <james-pl...@hotmail.co.uk> wrote: > Hi all, > > I'm quite new to wireframe, essentially what I want to do is display a graph, > and z-values > 1 would be yellow and those < 1 would be blue. > This is a bit of my data. > > 0.334643563 0.350913807 0.383652307 > 0.370325283 0.38779016 0.42387392 > 0.39861579 0.418389687 0.460692165 > 0.43888516 0.468015843 0.520560489 > 0.499544084 0.535099422 0.60982153 > 0.569888047 0.634351734 0.717646392 > 0.717202578 0.810887467 0.935152498 > 0.901982916 1.044895388 1.228306176 > 1.12856184 1.314210456 1.462055626 > 1.377314404 1.540372345 1.6206216 > 1.494044604 1.618244219 1.631295797 > > > > > > data.m = as.matrix(read.table("/Users/James/Desktop/c.txt", sep='\t')) > library(lattice) > wireframe(data.m,aspect = c(0.3), shade=TRUE, screen = list(z = 0, x = -45), > light.source = c(0,0,10), distance = 0.2) > > i know I probably need to use the col.regions or level.colors argument, but > I'm not sure what I actually need to supply to the arguments to get it to > work. > All the examples I've seen also have a gradient of color between two or more > colors, I want to color half the graph with z values > 1 yellow, and <1 blue.
Something like wireframe(volcano, drape = TRUE, at = c(90, 150, 200)) perhaps? Note that color may not vary within a quadrilateral, so your boundary will be jagged to some extent. -Deepayan ______________________________________________ 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.