[R] Alpha values
Prof Brian Ripley
ripley at stats.ox.ac.uk
Wed Nov 12 17:03:45 CET 2003
Yes, but currently only alpha=0 and alpha=255 are supported by the
available devices that I know of (and I introduced this).
Adding alpha-level support is complicated for the devices people normally
use, although it would be trivial in PDF1.4.
On Wed, 12 Nov 2003, Crispin Miller wrote:
> Does anyone know whether it is possible to construct a colour for
> plotting with an alpha value as well as simply specifying rgb values?
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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