I'm trying to do AEM eigenfunctions, but I have a different number of points into each reservoir (e.g.: reservoir 1-4 points, reservoir 2-6 points, reservoir 3-2 points....). Can someone help me?Besides this in the Legendre's book exemple in the part:>length.edge<-vector(length=nrow(edges.b))>for (i in 1:nrow(edges.b)){length.edge[i]<-D1.mat[edges.b[i,1], edges.b[i,2]]}There is some problem with the "lenght" argument.Thanks Fernanda Melo Carneiro contato: (62) 3521-1480 e 8121-7374www.ecoevol.ufg.br Laboratório de Ecologia Teórica e Síntese (UFG) [[alternative HTML version deleted]]