search for: ghlt

Displaying 4 results from an estimated 4 matches for "ghlt".

Did you mean: galt
2011 Sep 28
0
Trouble with performing post hoc analysis Tukey for lme model using ghlt
Hi, I am new to R and I am trying to perform a post hoc tukey test using the multcomp package's ghlt for a lme model. My first attempt at doing so gave me an output, HOWEVER I have tried to do this again, it keeps coming up with the error: (Error in contrMat(table(mf[[nm]]), type = types[pm]) : less than two groups) My model is looking at effect of incubation temperature (3 groups) on PHA wi...
2009 Jan 12
0
Two-way repeated measures anova with lme
...y(Anova(mod,idata=idata,idesign=~Time*Cond),multivariate=F) I would highly appreciate if anyone could explain why the results are slightly different. I probably spent hours to find an answer on the internet. I would like to use the lme function, because I need to do multiple comparisons with ghlt function. Regards, Erich [[alternative HTML version deleted]]
2011 Oct 21
1
Multiple factorial comparison LSD
Please help. I really like R and I have been looking at how to do LSD multiple comparison test with data that has more than one factor. So far, I am unsuccessful. Please help! Me
2011 Apr 11
3
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 variance across the factor levels by using the varIdent function. Then I wanted to perform multiple