Take a look at Figure 3.26 from Paul Murrell's book and associated code
posted here:

http://www.stat.auckland.ac.nz/~paul/RGraphics/chapter3.html

-Christos

 

> -----Original Message-----
> From: [EMAIL PROTECTED] 
> [mailto:[EMAIL PROTECTED] On Behalf Of Robert Biddle
> Sent: Wednesday, April 11, 2007 9:40 AM
> To: r-help@stat.math.ethz.ch
> Subject: [R] graphs superimposed on pictures?
> 
> Hi:
> 
> I am doing some work that involves plotting points of 
> interest superimposed on photographs and maps. I can produce 
> the plots fine in R, but so far I have had to do the 
> superimposition externally, which makes it tedious to do 
> exploratory work.
> I have looked to see if there is some capability to put a 
> background picture on a plot window, but I have not found anything.
> Advice, anyone?
> 
> Cheers
> Robert Biddle
> 
> ______________________________________________
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> PLEASE do read the posting guide 
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
> 
>

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