Re: [R] multiple comparisons with generalised least squares

Ariel THANK YOU for posting this. worked great for me just pasting this part into R Ariel wrote > model.matrix.gls <- function(object, ...) > model.matrix(terms(object), data = getData(object), ...) > > > model.frame.gls <- function(object, ...) > model.frame(formula(object), data

Re: [R] multiple comparisons with generalised least squares

racmar wrote > > I have also been searching various forums and books to see if there are > any methods I could use and have only found people, such as yourself, > asking the same question. > I was looking into this recently, as well, and found that the problem has to do with building the model

Re: [R] multiple comparisons with generalised least squares

Hi Sandy, I was wondering if you ever recieved an answer regarding the use of multiple comparisons for gls models? I have also been searching various forums and books to see if there are any methods I could use and have only found people, such as yourself, asking the same question. Many thanks

[R] multiple comparisons with generalised least squares

Dear R users, I have used the following model: M1 <- gls(Nblad ~ Concentration+Season + Concentration:Season, data=DDD, weights=varIdent(form=~ 1 | Season*Concentration)) to assess the effect of Concentration and Season on nitrogen uptake by leaves (Nblad). I accounted for the difference in vari