Dear list,


This is Elaine, a postgraduate studying bird distributions in East Asia.

I would like to ask how to generate NMDS graphs with the dot number
equal to the site number, using R vegan.

I read the vegan manual and copied the example code metaMDS.
(The code is as below)
However, the resulting NMDS graph has the dot number as
(site number*site number)/2.

Thank you in advance.

Code
library(MASS)
  library(vegan)
  NMDS  <-  metaMDS(dune,k=2, distfun  =  betadiver,  distance  =
 "sim",trymax=100,zerodist="add")
  plot(NMDS,  type  =  "n")

  # species as symbols
  points(NMDS, display = 'species', pch = '+', cex = 0.6)

  # sites as text
  text(NMDS, display = 'sites')

Elaine

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