Re: [R-sig-eco] Fwd: how to calculate axis variance in metaMDS, pakage vegan?

2009-12-10 Thread Maria Dulce Subida
Dear Gian, I'm still not quite sure about the functioning of adonis(). I made some proofs and I don't understand how does it calculate the degrees of freedom of a nested factor. But this is most probably due to my lack of experience with this function (as I told you I usually work with the

Re: [R-sig-eco] creating cluster with between points arbitrary distances

2009-12-10 Thread Nicholas Lewin-Koh
Hi Alex, Well in the example you show, almost any distance based clustering method would identify the relationship, from your example dd-dist(cbind(x,y)) cuttree(hclust(dd),2) However, what I think you are after is simply thresholding. So if x are your bird coordinates, then, library(igraph)

[R-sig-eco] Fwd: Fwd: how to calculate axis variance in metaMDS, pakage vegan?

2009-12-10 Thread Gian Maria Niccolò Benucci
Maria, *...Nevertheless you still do not know if your communities are significantly different between each other, within each host. Now it depends on the hypothesis you intend to test.*.. I think no sense for Community inside Host... Couse A and B are from the same host Corylus, and C and D

Re: [R-sig-eco] Fwd: Fwd: how to calculate axis variance in metaMDS, pakage vegan?

2009-12-10 Thread gabriel singer
A difference between two communities within a host could still exist and could make perfect sense, too, when you regard community as a random factor. Then community may introduce some extra variation (compared to the within-community variation), experimentally seen interesting and important,

Re: [R-sig-eco] Fwd: Fwd: how to calculate axis variance in metaMDS, pakage vegan?

2009-12-10 Thread Jari Oksanen
On 10/12/09 23:03 PM, gabriel singer gabriel.sin...@univie.ac.at wrote: A difference between two communities within a host could still exist and could make perfect sense, too, when you regard community as a random factor. Then community may introduce some extra variation (compared to the