[R] Trasparent graphs?
Paul Murrell
p.murrell at auckland.ac.nz
Tue Oct 14 23:38:12 CEST 2003
Hi
Kenneth Cabrera wrote:
> Hi R-users and R-experts:
>
> Is it posible to make transparent graphics on R?
> I mean, one graphic with colors over another one
> but both visible with transparent options?
In general this is not possible, but ...
If you are prepared to work with grid graphics, and produce SVG output,
and use a very experimental package, then take a look at the gridSVG
package (http://www.stat.auckland.ac.nz/~paul/index.html). The package
has a vignette with a very simple example of transparency and there are
a couple more examples in some talk slides also linked off the page
given above. The package has some serious deficiencies, but I have seen
one reasonably complex real usage of it.
A general alpha transparency graphical parameter may be added to R in
the near future, but even then this will not be respected by all output
formats.
Paul
--
Dr Paul Murrell
Department of Statistics
The University of Auckland
Private Bag 92019
Auckland
New Zealand
64 9 3737599 x85392
paul at stat.auckland.ac.nz
http://www.stat.auckland.ac.nz/~paul/
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