[R-sig-eco] Problems with vegdist in Vegan
Manuel Spínola
mspinola at una.ac.cr
Thu Nov 27 23:40:21 CET 2008
Dear list members,
I am runnig a NMDS in Vegan (version 1.13.2, Windows) and I get the
following message with the function vegdist:
> aves.dis <- vegdist(avesp.esp, dist="jaccard")
Warning messages:
1: In vegdist(avesp.esp, dist = "jaccard") :
you have empty rows: their dissimilarities may be meaningless in
method bray
2: In vegdist(avesp.esp, dist = "jaccard") : missing values in results
I have sites (point counts) without species, is it a problem?
Thank you very much in advance.
Best,
Manuel Spínola
--
Manuel Spínola, Ph.D.
Instituto Internacional en Conservación y Manejo de Vida Silvestre
Universidad Nacional
Apartado 1350-3000
Heredia
COSTA RICA
mspinola at una.ac.cr
mspinola10 at gmail.com
Teléfono: 277-3598
Fax: 237-7036
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