Is this of any use? http://tolstoy.newcastle.edu.au/R/help/06/04/25821.html
--- On Sat, 3/12/11, Allan Kamau <kamaual...@gmail.com> wrote: > From: Allan Kamau <kamaual...@gmail.com> > Subject: [R] Drawing a circle on an existing graph. > To: r-help@r-project.org > Received: Saturday, March 12, 2011, 3:08 AM > I would like to draw a circle on a > graph I am plotting in R and use > the current plot's coordinate system. > The most basic functionality I am looking for is the > ability to plot a > circle on an already existing graph by simply providing the > xy > coordinates for it's centre and the radius. > > I am also looking for a way to obtain x,y values of a point > (of a > circle) by specifying only the origin x,y the angle and > radius. > > Please point me so such a library and perhaps some simple > one line code. > > Allan. > > ______________________________________________ > R-help@r-project.org > mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, > reproducible code. > ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
