[R] how to draw the probability ellipse circle figure?

[Ben Bolker]

Jie TANG <totangjie <at> gmail.com> writes:

> 
> hi ,R user folks .
> 
> Nowadays I read a paper which draw a probability ellipse circle  figure
> shown in the appendix.
>  I wonder how to draw this figure by R ?
> the x-axis and y-axis both express the error but in different direction .

  Your question is quite vague, but perhaps you might start with the
ellipse package.  Also try

RSiteSearch("ellipse")