Re: [R-sig-eco] identifying groups in a cluster

hi, you also may be interested in this approach: library(vegan) library(sparcl) data(dune) dis - vegdist(dune) cluc - hclust(dis, complete) grp - cutree(cluc, 3) par(mfrow = c(2, 1)) plot(cluc) rect.hclust(cluc, 3) r - rect.hclust(cluc, 3) text(cumsum(sapply(r,length)),

Re: [R-sig-eco] PCA

Is it an assemblage that you are trying to ordinate? If so, you can use the hellinger transformation that is avaliable in the decostand function of vegan to transform the data so that when you ordinate it you will then have euclidean distances. See Legendre and Gallagher 2001 for the

[R-sig-eco] meta analysis books?

Hello everyone. Can anyone recommend books about meta-analysis? If they include examples in R it would be even better. Thanks! Mariano -- Dr. Mariano Devoto Cátedra de Botánica Facultad de Agronomía de la U.B.A Av. San Martín 4453 C1417DSE C.A. de Buenos Aires Argentina

[R-sig-eco] Using vegan with a large data set

Dear list, I'm trying to perform adonis and betadisper functions on a relative large data set (7000 sites x 50 spp.) and found that R cannot allocate that much memory to this task (I got an error along the line of Cannot allocate vector of xx Mb). I have tried to use some of the high performance