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st: RE: Re: Graph with 42 Subjects of Y axis P1 and P1 on xaxis


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Re: Graph with 42 Subjects of Y axis P1 and P1 on xaxis
Date   Mon, 1 Mar 2004 13:37:54 -0000

I don't know what Phase 1 and Phase 2 mean here. I 
assume just two measurements. 

I don't think that the graph I think you have in 
mind is necessarily going to be the most effective. 
In particular, exchanging axes may be effective. 
The main logic to that is that cholesterol as a response 
is better displayed vertically; in particular differences
are then explicit as vertical distances as well. (If 
ratios are of interest, use a log scale.) 

See 

McNeil, D.R. 1992. On graphing paired data.  
American Statistician 46, 307-11.

which in your case should be accessible through 
www.jstor.ac.uk 

For Stata implementations of graphs for comparison, 
see (e.g.) -pairplot-, -parplot- and -linkplot- on SSC. 

Some relevant material also at 
http://www.stata.com/support/meeting/9uk/compare_gph.pdf

Nick 
n.j.cox@durham.ac.uk 

Zoue Lloyd-Wright
> 
> 
> I would be most grateful if anyone can help me, apologies for the 
> stupidity.
> 
> I have 42 subjects, I would like to graph their cholesterol levels 
> Phase 1 and Phase 2.
> 
> BUT!!
> 
> I would like to place the 42 subjects individually on the yaxis and 
> their corresponding Phase 1 and Phase 2. data on the xaxis.
> 
> It does not matter if it is a dot or line representation

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