[R-sig-eco] cocorresp to determine best of several predictor communities

Dear List Members, I am using the 'cocorresp' package and trying to compare several pairs of communities. My goal would be to see which of several communities best predicts a final community. Say, for instance, that I have four communities A, B, C and D. I want to know which community best

Re: [R-sig-eco] Query as db-RDA

Dear Jari, Thank you for replying my question. I can get the multiplier of arrow ordinates, whichi is in a db-RDA figure, in R, according to your advice. I will study how to use R software from now on. Yours sincerely Shun Tsuboi [[alternative HTML version deleted]]

Re: [R-sig-eco] Standardizing data

Bruce, Standardizing might not be the best way to go if you have low counts. You can possibly assume that events follow a homogeneous Poisson process and rate varies with night length (linear or quadratic) [Y|x ~ Poisson(phi); log(phi)=f(x)]. You can estimate corresponding coefficients by glm().