[R] Positioning plots on top of each other (aligment & borders)

[Jim Lemon]

On 12/30/2009 08:32 PM, Jay wrote:
> Hello,
>
> I want to place two plots on top of each other. However, the problem
> is that I can't figure out a simple way to align them correctly. Is
> there a way to specify this?
> Since the data is bunch of coordinates and the second layer is an
> outline of a map (a .ps file I import using the grImport package), I
> suppose one option would be to specify a set of "artificial"
> coordinates that make up the very corners of that plot, and then have
> the second layer will this same space. Any ideas how to do this?
>
>
>    
Hi John,
I may be mistaken, but wouldn't it be easier to overlay your points on a 
map generated by the maps package? Your user units would then correspond 
to your coordinates.

Jim