Dear list members, I am working on an NMDS using metaMDS from vegan with the Doubs fish data from the book Numerical ecology with R.
> especies <- read.csv("DoubsSpe.csv", row.names = 1) > e.mds = metaMDS(especies, distance = "bray") Run 0 stress 0.003706943 Run 1 stress 0.0004788424 ... New best solution ... procrustes: rmse 0.009197047 max resid 0.01874812 Run 2 stress 0.0004600702 ... New best solution ... procrustes: rmse 0.0002883791 max resid 0.0005590752 *** Solution reached Mensajes de aviso perdidos In distfun(comm, method = distance, ...) : you have empty rows: their dissimilarities may be meaningless in method bray > My results are "strange" (stress is too low and different to the one on the book) and the plot is very different to the one that appears in the book. Any clue what is the problem? Best, Manuel -- *Manuel Spínola, Ph.D.* Instituto Internacional en Conservación y Manejo de Vida Silvestre Universidad Nacional Apartado 1350-3000 Heredia COSTA RICA mspin...@una.ac.cr mspinol...@gmail.com Teléfono: (506) 2277-3598 Fax: (506) 2237-7036 Personal website: Lobito de río <https://sites.google.com/site/lobitoderio/> Institutional website: ICOMVIS <http://www.icomvis.una.ac.cr/> [[alternative HTML version deleted]]
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