
>I would like>to perform a cluster analysis to data of presence absence. 
>Which distance
>and group linkage methods are best?
>Sincerely,
>Fco.
>Cabrera
   
Hi Francisco,
I used HIERARCHICAL CLUSTERING (AGNES), METHOD= PGMA CLUSTERING (FLEXIBLE) ON A 
SORENSEN SIMILARITY DISTANCE MATRIX
Sorensen in ade4 package; PGMA on flexible method in cluster package. 
I am happy with the results.
Best, Dragos

Dragos G. Zaharescu
-----------------------------------------
Postdoctoral research associate

Biosphere 2, University of Arizona
Marshall Building, Room 526
845 N. Park Avenue
Tucson, Arizona 85721-0158, U.S.A.
-----------------------------------------

            zaharescu@email.arizona.edu
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