[R] color of opposite sign values in filled.contour

[Achim Zeileis]

On Thu, 4 Jan 2007, Richard M. Heiberger wrote:

> Get the RColorBrewer package from CRAN
>
> Description: The packages provides palettes for drawing nice maps
>        shaded according to a variable.

The package "vcd" also offers the function diverge_hcl() that constructs 
diverging palettes (based on HCL colors) particularly aimed at 
filled.contour() or image() plots. See
   http://epub.wu-wien.ac.at/dyn/openURL?id=oai:epub.wu-wien.ac.at:epub-wu-01_abd
for some more background information.
Z