Dear all, I used adonis to perform a test of the pairwise site dissimilarity indices proposed by Baselga (2010, 2012) in the package betapart. I am concerned about my results because I get some negative F-values. I read in another post that this may happen because of the presence of negative eigenvalues. However I was wondering if this does invalidate the results, or if they are still interpretable in some way. Moreover in case the results are still valid, do you think that providing a result table containing negative F-values will be considered for publication or be an argument of refusal? I may use distance-based RDA with the cailliez correction instead, would it be a good alternative to adonis for testing the effect of a three-level factor on the dissimilarity measures?
Best wishes, Valerie Coudrain ___________________________________________________________ CAN 2013 : résultats et matchs en direct à suivre sur Voila.fr http://sports.voila.fr/football/can/ _______________________________________________ R-sig-ecology mailing list [email protected] https://stat.ethz.ch/mailman/listinfo/r-sig-ecology
