confidence ellipses

[Pedram Sendi <psendi@uhbs.ch>]

Dear All

 

I have approximated a bivariate distribution f(a,b) using simulation, i.e. I have 5000 values of pairs of a,b. I would now like to plot a smooth 95% confidence ellipse, 50% confidence ellipse and 5% confidence ellipse. The contour plot feature does not seem to work. I would be very grateful if someone could tell me how to accomplish this in S-Plus 6.1 for Windows.

 

Thanks for any help.

 

Best wishes,

Pedram

 

Pedram Sendi, MD, DSc

Institute for Clinical Epidemiology & Division of Infectious Diseases

Institut fur klinische Epidemiologie & Abteilung fur Infektiologie

Basel University Hospital

Kantonsspital Basel

Hebelstrasse 10, 3rd Floor

CH-4031 Basel

Switzerland