Gavin Simpson wrote: > hits=-2.6 tests=BAYES_00 > X-USF-Spam-Flag: NO > > On Wed, 2008-01-23 at 02:59 -0800, Diana Perdiguero wrote: >> We need a two-way non-parametric ANOVA in order to analysis properly some >> ecological data, do you know any reference in R? or how to do it? >> Thank you very much >> All the best >> >> diana > > Diana, > > If your ecological data are multivariate then take a look at adonis() in > package vegan, and the references therein, to see if it is suitable. > > HTH > > G >
Also, the proportional odds ordinal logistic model is a generalization of Wilcoxon-Kruskal-Wallis test. It can easily handle interactions in the model. See the lrm function in the Design package or the polr function in the MASS package. For a tutorial on ordinal logistic regression in ecology (using lrm), see @Article{gui00ord, author = {Guisan, Antoine and Harrell, Frank E.}, title = {Ordinal response regression models in ecology}, journal = {Journal of Vegetation Science}, year = 2000, volume = 11, pages = {617-626}, annote = {teaching;ordinal logistic model} } -- Frank E Harrell Jr Professor and Chair School of Medicine Department of Biostatistics Vanderbilt University ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.