[Rd] fonts in postscript device

[Erich Neuwirth]

I humbly suggest adding the fonts argument
to the list of arguments recognized and processed
by ps.options.

Here is my argument:
Currently, in Sweave it seems to be impossible
to use multiple font families in <<fig=TRUE>>
code chunks without additional moderately inconvenient
coding.

The problem is that it is possible to use
par(family="xxx") in postscript and pdf devices
(which are the devices used by Sweave),
but the fonts used in par statements also have to be included
in the fonts argument of the postscript or pdf device
when the device is opened.

In normal mode, Sweave opens the device all by itself, therefore
in this mode it seems not possible to change the fonts used by the
postscript or pdf device. Instead, one has to explicitly open the device
in one's own code chunk. That is possible, but then
one has to manually take care of including the generated
postscript and/or pdf files also.

The easiest solution would be that ps.options
accepts the fonts parameter, which it currently does not.
That way, one could set the fonts available by default
when Sweave uses the postscript device.


-- 
Erich Neuwirth, Didactic Center for Computer Science
University of Vienna
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