[R] how to draw an ellipse

[Ben Bolker]

Guillaume Allain <guillaume.allain <at> cbconseil.com> writes:

> 
> That's probably a stupid question, but I'm looking for a low-level 
> command which plots ellipse, specifying only center and deformation 
> axes. The purpose is to illustrate bivariates gaussians with 2D .95 
> confident levels without using any specific library.
> 
> Thanxs for your help,
> 
> Guillaume


  I don't know exactly why you want to avoid "using any specific
library", but the ellipse package (sic) would seem to do what
you want pretty conveniently ...

  cheers
    Ben Bolker