[R] alternatives to RColorBrewer?
Achim.Zeileis at wu-wien.ac.at
Thu Apr 24 20:15:06 CEST 2008
On Thu, 24 Apr 2008, Andrew Yee wrote:
> I've found RColorBrewer useful for its qualitative palettes, but wished that
> it could generate more than 12 qualitative palettes (e.g. with Set3). Any
> suggestions for alternative color palette generators that can handle e.g. 18
> distinctive colors? (I'm aware of using rainbow(), but this doesn't
> generate enough distinct colors when the number of palettes is large).
Package "vcd" implements several palette generators in HCL space which are
somewhat similar to the palettes in ColorBrewer but provide some more
flexibility. The underlying ideas are explained here
See also help("rainbow_hcl", package = "vcd") which has a few more
examples. However, I guess that it will be hard to select a qualitative
palette with 18 distinct colors...I couldn't imagine a plot where it would
be sufficiently easy for humans to decode that. But maybe you can combine
that with some sequential or diverging palette or so?
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