[R] Parliament Seats Graph

[Stefan Petersson]

Hi,

Is there any package (or homegrown function) that can produce
"Parliament Seats Graph"? I'm referring to the nice looking concentric
half circles of colored "seats" as seen on Wikipedia (for example).

I can pretty easily plot the points and color them. But I can't group
the colored points in sectors, as seen on the example.

Example:
http://en.wikipedia.org/wiki/Verkhovna_Rada#mediaviewer/File:Fractions_of_the_Parliament_of_Ukraine.svg

Found here (on the right, a bit down):
http://en.wikipedia.org/wiki/Verkhovna_Rada

TIA