Re: st: Suggestions for Second Edition of A Visual Guide to Stata Graphics

[Ronan Conroy <rconroy@rcsi.ie>]

On 25 Jul 2007, at 18:34, Nick Cox wrote:

> I am not clear what the difficulty here is at all. Please give
> a specific example or more detail.
I have encountered the same problem, trying to make a graph for a  
researcher. She wanted to plot something for patients with antibody  
A, antibody B, either antibody, both antibodies and without either  
antibody.

Clearly the groups are not mutually exclusive, and a nuisance to  
plot. While Stata is good at groups which are mutually exclusive, it  
does not seem to foresee overlapping groups on the same plot -  
probably because you can't see them ending up in the same model.

I ended up calculating relative risks and confidence intervals for  
each of the groups above, then making a little dataset of them and  
using -metan- to display the results.

P    Before printing, think about the environment
=================================
Ronan Conroy
rconroy@rcsi.ie
Royal College of Surgeons in Ireland
120 St Stephen's Green, Dublin 2, Ireland
+353 (0)1 402 2431
+353 (0)87 799 97 95





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