Hi Ali,
While you might be interested in using code provided here for preparing 
lectures for teaching, the purpose of this mailing list is to discuss 
how to actually teach R in the classroom. Your question is a general 
question about R not about how to teach R. You really should send these 
messages to R-help and I note that several other people in the past 
(besides Gavin) have told you that these posts should be directed at 
that mailing list and not here as they are off-topic. Also posting to 
the R-help mailing list will ensure you get a speedy reply.
Chris

On 06/14/2010 01:11 PM, Ali Zanaty wrote:
> Dear Gavin:
>
>
>
> I am preparing class notes for an introduction course in R (undergraduate level).
>
>
>
> I have this data and I want to know how to plotting two ellipses (one for each group) in the same graph.
>
>
>
> With many thanks
>
>
>
>
>
> Ali
>
>
>
> --- On Mon, 6/14/10, Gavin Simpson<gavin.simpson@ucl.ac.uk>  wrote:
>
> From: Gavin Simpson<gavin.simpson@ucl.ac.uk>
> Subject: Re: [R-sig-teaching] Plotting two elipses in the
> To: "Ali Zanaty"<zanaty2005@yahoo.com>
> Cc: r-sig-teaching@r-project.org
> Date: Monday, June 14, 2010, 5:33 PM
>
> You are posting to the *wrong* list! Your question has nothing to do
> with Teaching and R?
>
> Please post on the main R-Help mailing list.
>
> G
>
> On Mon, 2010-06-14 at 10:19 -0700, Ali Zanaty wrote:
>    
>> Dear All R Users:
>>
>>
>>
>>
>>
>> What I need to do is to plot two elipses 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 elipses.
>>
>>
>>
>> With many thanks.
>>
>>
>>
>> Data can be found at
>>
>>
>>
>> http://www.usm.maine.edu/~aaboueissa/Rhelps/dataelipse.txt
>>
>>
>>
>>
>>
>> Thank you so much for your helps.
>>
>>
>>
>> Ali
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>         
>>      [[alternative HTML version deleted]]
>>
>> _______________________________________________
>> R-sig-teaching@r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-sig-teaching
>>      
>    
>
>
> _______________________________________________
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>    


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