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...tions aov() and lm() to run the ANCOVA then I tried TukeyHSD() but it didn't work (because of the covariable is a continuous variable?). Furthermore, I would like to plot the adjusted values (i.e. the values of the tested variable taking into account the covariable). Thanks for your help! N. Poulet [[alternative HTML version deleted]]

...area and geology of the river) and I have only 2 regions. Note that sometimes I have only one site per river. I would like to know the part of each spatial scale in the species richness variance. I looked into the nlme package but I did not found how to proceed... Thanks for your help Nicolas Poulet Laboratoire d'Ecologie des Hydrosyst?mes LEH - UMR UPS-CNRS 5177 Universit? Paul Sabatier, b?t 4R3 118, route de Narbonne 31062 Toulouse Cedex 9

Hello, I have a population of 2000+ zoo time series (but my environment also contains objects that are not zoo time series). I'm trying to calculate the latest 90 days Z-Score of all zoo time series, using the following code: LZS<-function(ser) { temp<-window(ser,start=Sys.Date()-90) last((temp-mean(temp))/sd(temp)) } sapply(ls(), LZS ) The LZS function works on individual zoo time

Hi! I'm having a small problem with an assignment I have to do. We want to do an anova on some values, given for four different types of medicine. The different sample numbers are not identical (eg for molecule A we have 8 values, for B we have 14, etc.). What would the most elegant way of getting this info into R to do an lm be? I usually try to use data.frames but R categorically

Hi I started studying Bioinformatics at my engineering school (INSA de lyon!) in september. We started learning statistics and did two classes of R hands-on, but I want to learn to use R better. (As in for my every day calculations - I'm in front of a computer anyway so why should I have to take out my TI-30?) I'm having trouble finding some of the simpler stat functions though.