[R] circle / oval / semicircle ?

[Barry Rowlingson]

ivo_welch-Rstat at mailblocks.com wrote:
> 
> hi:  where would I find facilities to draw circles, ovals, and 
> semicircles?   (or should I construct them myself using curve?)
> 

We did semicircles last month, only they were called half-circles then:

http://tolstoy.newcastle.edu.au/R/help/04/05/0849.html

lines() and polygons() can draw just about anything.

Baz