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...es"... I have also tried with the raw distance matrix D and also the agnes function, but the same happens. The hclus and agnes dendrogram is logical, whereas the newick tree is not. Thanks for any help! -- Jose Sergio Hleap Lozano, M. Sc. Ph. D. Student, Dalhousie University Researcher, SQUALUS Foundation

Hi R users, I have a dataset with multiple variables and i'm trying to weigh average depths for fish species per year by their abundance (CPUE. I have tried the weighted.mean function but as i have two columns for the x value the lenghts differ with the w (CPUE). How do I solve this problem? So far I have tried this: data<-by(allspecies, list(allspecies$Depth, allspecies$Year),