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st: RE: RE: Re: Compositional data


From   "Verkuilen, Jay" <JVerkuilen@gc.cuny.edu>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: RE: Re: Compositional data
Date   Wed, 5 Mar 2008 15:50:19 -0500

Nick Cox wrote:

>>For more details on the Aitchison book, which sells under a slightly
different title, see

http://www.blackburnpress.com/stanofcoda.html<<

Whoops. Yes, it's Statistical Analysis of Compositional Data... sitting
right there on the shelf in front of me. 

http://en.wikipedia.org/wiki/John_Aitchison


>>A project of mine for 2008, already started, is to publish Stata
programs for alternatives 
to such plots, all using some kind of transformation, including some
suggested by Aitchison.<<

Interesting. I look forward to seeing these, as reading a triangle plot
is difficult and often misleading, because the metric is so far from
Euclidean. 

Jay 



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