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2005 May 15
3
adjusted p-values with TukeyHSD?
hi list,
i have to ask you again, having tried and searched for several days...
i want to do a TukeyHSD after an Anova, and want to get the adjusted
p-values after the Tukey Correction.
i found the p.adjust function, but it can only correct for "holm",
"hochberg", bonferroni", but not "Tukey".
Is it not possbile to get adjusted p-values after
2005 May 23
0
using lme in csimtest
...factors (see below).
Is it possible to correctly calculate Tukey contrasts for one factor in a
lme model with multiple factors using csimtest or another function in R? If
so, how can I do this?
Many thanks,
René Eschen.
#
summary(simtest(response~treatment*(site+time),type="Tukey",whichf="treatment"))
# Simultaneous tests: Tukey contrasts
#Call:
#simtest.formula(formula = response ~ treatment * (site + time), whichf =
"treatment", type = "Tukey")
#
# Tukey contrasts for factor treatment, covariables: site +time
+treatment:site + tre...
2003 Jan 30
1
TukeyHSD and BIBD
Hi,
the function TukeyHSD gives incorrect results for balanced incomplete block
designs, as the example below shows, but I can only half fix it. There are
two problems,
1. It uses model.tables to estimate treatment means,
2. It uses the wrong standard error
The first problem can be fixed using dummy.coef, if the lines
> TukeyHSD.aov
function (x, which = seq(along = tabs), ordered = FALSE,
2005 Jul 15
1
Adjusted p-values with TukeyHSD (patch)
...equivalent, for example:
data(warpbreaks)
fm1 <- aov(breaks ~ wool + tension, data = warpbreaks)
tHSD <- TukeyHSD(fm1, "tension", ordered = FALSE)
print(tHSD)
mcHSD <- simint(breaks ~ wool + tension, data = warpbreaks,
whichf="tension", type="Tukey")
summary(mcHSD)
I also attached the complete function (mTukeyHSD.R) to this
message, in case the patch is not accepted and someone else needs to do
the same thing. In any case, I think the reference to the multcomp
package in the TukeyHSD...
2004 Apr 19
0
Seeking help with multcomp
...airwise.t.test(q12a, quota, p.adj = "fdr")
$method
[1] "t tests with pooled SD"
$data.name
[1] "q12a and quota"
$p.value
1 2 3 4 5 6 7 8 9
2 4.805732e-09 NA NA NA NA NA NA NA NA
> simtest(q12a ~ quota)
Error in parseformula(formula, data, subset, na.action, whichf, ...) :
at least one factor required
> simtest(q12a ~ factor(quota))
Error in parse(file, n, text, prompt) : parse error
> simtest(q12a ~ factor(quota),na.action=na.exclude)
Error in parse(file, n, text, prompt) : parse error
Greg Blevins
Partner, The Market Solutions Group
Windows...