[R] Create a plot legend in a new window

[michael watson (IAH-C)]

Hi

I have a complicated plot which has a potentially large legend.  What I
want to do is actually create the legend in a new window.  Has anyone
done this before?  I'd like to be able to create a window with just the
legend in it, and have it so the window is just the right size etc.  I'm
sure someone must have done this already?  If not, any tips would be
welcome.

Thanks
Mick