Hi Diana, Look at Edgar Brunner's Homepage
http://www.ams.med.uni-goettingen.de/en/sta/e.brunner.html and here: http://www.ams.med.uni-goettingen.de/en/sof/index.html Unfortunately, the R script for a 2x2 design with two groups and two timepoints (f1.ld.f1.r) seems to be broken. Uncommenting the branch to the special case "case2x2" in the script should do well, and more than 2 groups or timepoints seem to be working, too. The basic problem with non-parametric (i.e. ordinal) Anova with more than one factor is that the covariance matrix is not homoscedastic anymore after a rank transformation, and autoregressive or compound symmetry covariance structures are destroyed. Best wishes, Matthias Diana Perdiguero schrieb: > 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 > ______________________________________________ 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.
