[R] It This data viz possible in R?

[Jim Lemon]

On 04/08/2010 12:44 AM, Gabor Grothendieck wrote:
> There is draw.arc in the plotrix package.
>
Well, draw.arc is specified by center, radius and start/finish angles, 
so it would be a lot of calculation to get these from the two points 
that must be joined on the circumference. I would probably translate 
this into the Postscript arct command, as you would probably have to use 
the Postscript or similar device to get a decent image. I programmed 
something similar, but a lot simpler, some years ago in Postscript and 
it worked out pretty well. Getting the correct angle for the text was 
tricky, you can see how some of the text on the example is upside down.

Jim