R help - Jun 2010 - Plotting two ellipses in one graph

Dear R Users: 

What I need to do is to plot two ellipses in the same graph (one for
each group). You can use either X1 or X2 as the X-axis and the other
variable as the Y-axis.

Also I need to show the 95% C.I. or P.I. of the overlapping part of the two
ellipses, and for each ellipse separately.

Data can be found at  

http://www.usm.maine.edu/~aaboueissa/Rhelps/dataelipse.txt


Thank you so much for your attention to this matter.

Ali


      
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