[R] Plot symbols for more than 25 groups
Prof Brian Ripley
ripley at stats.ox.ac.uk
Fri Apr 2 17:47:19 CEST 2004
On Fri, 2 Apr 2004, Ken Knoblauch wrote:
> A rainbow has a continuous distribution of wavelengths. These are
> not at all the same thing as colors!
I did not say they were. However, a rainbow has infinitely many colours
(it is show as an arc on a standard colour chart), and your statement
about `not at all the same thing'.
Note that R has a rainbow() function, and that too is nothing to do with
> Quoting Prof Brian Ripley <ripley at stats.ox.ac.uk>:
> > You would do well to get people to recognize more than a dozen spot
> > colours, too -- we are tuned to recognizing quite large blobs of colour.
> > We see only about a dozen colours in a rainbow, which has infinitely many
> > and they are adjacent.
Brian D. Ripley, ripley at stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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