On Fri, 18 Mar 2011, Frank Schwach wrote:
Hi,
I'm plotting a heatmap with values ranging from -10 to +10 and I would
like the negative values to show up in shades of blue and the positive
ones in shadea of red. Basically, I want exactly what the RColorBrewer
palette RdBu does but with more of a gradual change (the RdBu can only
give me 11 distinct colours). Any suggestions?
See the function diverge_hcl() in the package "colorspace" which provides
a wide variety of HCL-based color palettes. These are similar in spirit to
the ColorBrewer palettes but were designed to provide more fine control.
See the examples and the associated CSDA paper for more details.
Best,
Z
Thanks!
Frank
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