I think the previous suggestions have solved your problem, but just in case
you need even more flexibility, you could try using the cairo graphics
device (cairoDevice) in conjunction with the GdkPixbuf bindings provided by
RGtk2. This allows fairly advanced image manipulation operations (scaling,
compositing, ...) on R graphics.

Michael

On 4/11/07, Robert Biddle <robert_biddle@carleton.ca> wrote:
>
> 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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