I want to migrate from SAS to R. I used proc mixed to do comparison between multiple groups and to perform multiple comparison between groups since, as far as I know, proc mixed does not make assumptions about the data and so it is better than a simple anova (data must only be normal). Es. how can I translate a code like this (two way anova with a factor of repetition) :
proc mixed; class kind PEEP codice; model PaO2_FiO2 = kind PEEP kind*PEEP; repeated /type = un sub=codice; lsmeans kind*PEEP /adjust=bon; run; codice is a unique identifier of patient kind is a variable which subdivided the patient (i.e. red or brown hairs) PEEP is positive end expiratory pressure. These are the steps of a clinical trial. Patient did the trial at PEEP = 5 and PEEP = 10 Thank you Massimo Cressoni run; ______________________________________________ R-help@stat.math.ethz.ch 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.