[Rd] Re: Writing graphics code (was: [R] get vector data from contour)

[Paul Murrell]

Hi


----- Original Message -----
From: Duncan Murdoch <murdoch@stats.uwo.ca>
To: <r-devel@stat.math.ethz.ch>
Sent: Thursday, February 08, 2001 6:51 AM
Subject: [Rd] Re: Writing graphics code (was: [R] get vector data from
contour)


> I submitted a message to r-help this morning that really belongs in
> r-devel; here's its URL in the archive:
> <http://www.r-project.org/nocvs/mail/r-help/2001/0693.html>.
>
> In summary, I suggest that R graphics objects should be accessible and
> modifiable, but it raises some problems if you want to do it without
> pointers.


I have been doing some similar stuff to what you describe (primitives and
groups arranged in hierarchies), but for 2D graphics, and I have used Luke
Tierney's "external pointers" to provide access to graphical objects which
represent the graphical output.  See the R developer page
http://developer.r-project.org/ for Luke's stuff, but please note the
disclaimer at the top of that page.

Paul


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