On 22/11/2009 1:07 AM, Marc Chiarini (Tufts) wrote:
Dear R Community:
Recently, I have managed to plot some really useful graphs of my
research data using persp(). I have even figured out how to overplot
rectangular regions (corresponding to submatrices) with a different
color. This is accomplished by using par(new=T). I am now searching
for a way to "highlight" a set of (possibly non-contiguous) facets with
a specific color, e.g., the facet between each set of four points whose
values are all above a certain threshold. An example would be coloring
the raised corners of the classic sombrero (found in example(persp))
differently from the rest of the sombrero. I feel like the last example
in persp() is pointing me in the right direction, but I'm not quite
getting it. Any help is much appreciated.
Think of the facets as an nx-1 by ny-1 matrix. Pass the col arg by
creating a matrix of this shape. (A vector version of the data in the
matrix would also be good enough.)
If you pass something shorter, it will be recycled to that length.
You could also use persp3d from the rgl package, but an important
difference is that it colours all nx by ny vertices, and interpolates
colours on the facets. So you can't use the same colour matrix as in persp.
Duncan Murdoch
______________________________________________
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.
