Displaying 20 results from an estimated 1000 matches similar to: "problem with "simtest""
2006 Mar 09
1
bugs in simtest (PR#8670)
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This report is joint from Richard Heiberger <rmh at temple.edu>
and Burt Holland <bholland at temple.edu>.
Burt Holland is the coauthor
2004 Jan 18
1
multcomp, simint, simtest and computation duration
Dear R-listers,
I am trying to compute simultaneous confidence intervals with simint from the package multcomp. 230 measures (abundance) have been taken in 23 sites (factor) of a data.frame (donnees: a file can be sent on request, saved with save(donnees,file="donnees")). I would like to get all pairwise comparisons with :
mc<- simint(ren~ID,type="Tukey",data=donnees)
I
2007 May 21
2
more simplified output from glht object
Hi,
I use glht to make multcomp, using Tukey, from a glm model.
It is possible to get a more simplified output of result? Somethink like
ordering by letters.
Thanks
Ronaldo
--
Human kind cannot bear very much reality.
-- T. S. Eliot, "Four Quartets: Burnt Norton"
--
> Prof. Ronaldo Reis J?nior
| .''`. UNIMONTES/Depto. Biologia Geral/Lab. de Ecologia
| : :' :
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
2004 Aug 13
5
simtest for Dunnett's test
Hi!
I use simtest fonction of multcomp package to compile a Dunnett's test.
I have 10 treatments and one control group, so i create a matrix with:
m<-matrix(0,10,11)
m[1,1]<--1
m[1,2]<-1
m[2,1]<--1
m[2,3]<-1
m[3,1]<--1
m[3,4]<-1
m[4,1]<--1
m[4,5]<-1
m[5,1]<--1
m[5,6]<-1
m[6,1]<--1
m[6,7]<-1
m[7,1]<--1
m[7,8]<-1
m[8,1]<--1
m[8,9]<-1
2002 Jun 26
2
contrast matrix in package multcomp
Hi,
I've got a problem building a contrast matrix for the Dunnet contrast in
package multcopm. The following works fine:
> summary(simtest(adiff ~ trial))
Simultaneous tests: Dunnett contrasts
Data: adiff by trial
Contrast matrix:
trial1 trial2 trial3 trial4 trial5
trial2-trial1 -1 1 0 0 0
trial3-trial1 -1 0 1 0 0
2003 Nov 05
2
Multiple comparisons with a glm
I've never seen anything written about multiple comparisons,
as in the multcomp package or with TukeyHSD, but using a glm.
Do such procedures exist? Are they sensible?
Are there any packages in R that implement such comparisons?
Thank you.
--
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France
Tel: +33 (0)4 72 91 34 77
Fax: +33 (0)4 72 91 34 61
2008 Oct 23
1
Fw: It 's correct to do contrasts for a GLM?
Hi all
I am one recent user of R and have a few doubts
I did a binomial GLM with 3 - factor and now I have to test contrasts to
identify that treatments are different. I know that the contrasts are used
in ANOVA, it is not incorrect to use them in GLM? there is a way to do
contrasts between treatments for GLM as a Tukey for the ANOVA?
Susana
2004 May 20
4
pmvt problem in multcomp
Hi, all:
Two examples are shown below.
I want to use the multiple comparison of Dunnett.
It succeeded in upper case "example 1".
However, the lower case "example 2" went wrong.
In "example 2", the function pmvt return NaN, so I cannot show
this simtest result. Is there any solution?
(I changed the variable "maxpts" to a large number in front of
the
2004 Feb 03
1
output from multcomp and lm
Dear R-users
I analysed the same data set by two different ways;
analysis of covariance by using lm and anova functions
and multiple comparison by using simtest function in
the multcomp library.
The output from the analysis of covariance is;
> y<-lm(D~Cond+Q1,data=x)
> anova(y)
Analysis of Variance Table
Response: D
Df Sum Sq Mean Sq F value Pr(>F)
Cond 2
2003 May 14
1
Multiple comparison and lme (again, sorry)
Dear list,
As a reply to my recent mail:
> simint and TukeyHSD work for aov objects.
> Can someone point me to similar functions for lme objects?
Douglas Bates wrote
There aren't multiple comparison methods for lme objects because it is
not clear how to do multiple comparisons for these. I don't think the
theory of multiple comparisons extends easily to lme models. One
could
2007 Mar 18
1
multcomp
I used the multcomp package sometime back for doing multiple
comparisons. I see that it has been updated and the methods like simint
are no longer supported. When I run the program it prompts to me to use
glht. How do I get the lower and upper conf int and the pValues using
glht? Does anyone have an example?
Thanks ../Murli
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2006 Feb 16
0
(m)simtest ?
Hi,.
We have 2 values (first formant F1, second formant F2) for a given
phoneme for six languages. We want to see whether the languages are
significantly different one from another for this given phoneme.
We have done a manova on our data and it works well, but we doesn't
allow us to see which pair of languages are different.
If we have only one formant for the phoneme, we would use
2005 Dec 07
1
contrasts for lm
I would like estimate a number of contrasts from a one-way ANOVA model. I see
that the lm command has a contrasts option, but I can't figure out how to use
it! Any help that can be offered would be greatly apreciated.
Here is my model statement:
Model<-lm(log2PM~P+T+P*T)
where P has 16 levels, T(treatment) has 12 levels and I am interested in
looking at different treatment
2006 Jul 22
3
Multcomp
Here it is again, hope this is more clear
I am using the following data (only a small subset is given):
Habitat Fungus.yield
Birch 20.83829053
Birch 22.9718181
Birch 22.28216829
Birch 24.23136797
Birch 22.32147961
Birch 20.30783598
Oak 27.24047258
Oak 29.7730014
Oak 30.12608508
Oak 25.76088669
Oak 30.14750974
Hornbeam 17.05307949
Hornbeam 15.32805111
Hornbeam 18.26920177
Hornbeam 21.30987049
2011 May 01
1
Simulation Questions
I have the following script for generating a dataset. It works like a champ except for a couple of things.
1. I need the variables "itbs" and "map" to be negatively correlated with the binomial variable "lunch" (around -0.21 and -0.24, respectively). The binomial variable "lunch" needs to remain unchanged.
2. While my generated variables do come out
2005 Jul 15
1
Adjusted p-values with TukeyHSD (patch)
Dear R-developeRs,
Attached follows a patch against svn 34959 that adds the
printing of p-values to the TukeyHSD.aov function in stats package. I
also updated the corresponding documentation file and added a 'see also'
reference to the simint function of the multcomp package.
As it was already brought up in a previous thread [1] in R-help,
one can obtain the adjusted
2006 Oct 24
0
New version of `multcomp' on CRAN
Dear useRs,
`multcomp' version 0.991-1 will be shortly available from
CRAN near you. Nearly all functionality contained in the
package has been re-implemented from scratch.
The focus of the package has been extended to general linear
hypotheses in arbitrary parametric models and the most important
function to check out is `glht()'. Multiple comparison of
means procedures (for example
2006 Oct 24
0
New version of `multcomp' on CRAN
Dear useRs,
`multcomp' version 0.991-1 will be shortly available from
CRAN near you. Nearly all functionality contained in the
package has been re-implemented from scratch.
The focus of the package has been extended to general linear
hypotheses in arbitrary parametric models and the most important
function to check out is `glht()'. Multiple comparison of
means procedures (for example
2005 Sep 15
3
means comparison in R (post-hoc test)
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Hi.
I have been using SAS for some time, and now I have discovered R. I am
very happy with it, but I have not found out how to perform some of the
multiple comparisons I was used to do in SAS.
With the SAS/STAT, I generally used the MEANS (for comparison of
arithmetic means) and the LSMEANS (for adjusted means) statements of the
GLM procedure (I