[R-sig-eco] forward selection of significant eigenvectors

[Irene Adamo]

Dear all,

I am trying to run a variaion partitioning in using the varpart function in
vegan. I would like to include the geographic coordinates as explanatory
variables so I calculated the principle coordinates of neighbour matrices.
Now I would like to perform a selection of the significant spatial
eigenvectors but I don`t know how to do it in R. Could anybody help me?

data(mite.xy)
pcnm1 <- pcnm(dist(mite.xy))

then I get the pcnm vectors and I would like to select only the
significant ones.

Thanks a lot!

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