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st: RE: Hierarchical clustering: long format?


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Hierarchical clustering: long format?
Date   Mon, 8 Oct 2007 20:39:27 +0100

I don't understand this. Seemingly no one else
does either. 

Similarity matrices are square. So, there is no
choice between wide and long, and no possibility
of them being oblong (rectangular, if you wish, 
but a square is a rectangle too). 

Very likely I am misunderstanding what you want. 

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

Jakob Petersen
 
> I would like to cluster a fairly large number of observation based on
> presence of cases for a number of variables. Hierarchical clustering
> with e.g. jaccard's similarity would be possible for a relatively
> small data set due to the size of the similarity matrix (n x n). Is it
> possible to use stata's cluster function with similarity matrices in a
> long rather than wide format?

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