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