Yes you are missing something -- the underlying ideas of post hoc
tests. This is a statistics issue, not an R issue, and so off topic
here. Try posting on a statistics forum like stats.stackexchange.com
instead.
Cheers,
Bert
Bert Gunter
"Data is not information. Information is not knowledge. A
Hi all,
I performed a Kruskal-Wallis test on 4 groups, 13 variables, using
kruskal.test. I then applied a pos-hoc on the variables significant at
p<0.05, using kruskalmc. The problem is that two of the significant
variables on the kruskal-wallis test (with p=0.03276 and p=0.03537) didn´t
showed si
--- Original Message -
> From: Chintanu
> To: R help
> Cc:
> Sent: Monday, April 15, 2013 1:18 AM
> Subject: [R] Kruskal-Wallis
>
> Hi,
>
> I have got two groups of samples; and for every row, I wish to calculate
> Kruskal-Wallis' p-value.
> In the ex
s)$p.value)
[1] 0.08326452 0.08326452 0.56370286 0.56370286 0.24821308 1.
[7] 0.08326452 1. 0.37425932 0.56370286
A.K.
- Original Message -
From: Chintanu
To: R help
Cc:
Sent: Monday, April 15, 2013 1:18 AM
Subject: [R] Kruskal-Wallis
Hi,
I have got two groups of samples; an
Hi,
I have got two groups of samples; and for every row, I wish to calculate
Kruskal-Wallis' p-value.
In the example below, and the stars () show where I am struggling to
design and put things together. Any help would be appreciated.
myFile <- data.frame(Sample_1a = 1:10, Sample_1b = 2:11, S
I didn't do any research about this but I think it's the following:
If you run several t-tests to compare groups and then do a tukey-HSD you
won't get the same results either.
It's the same with the kruskal-wallis test. This happens because the
variance that is used for computing significant differ
-boun...@r-project.org [mailto:r-help-bounces@r-
> project.org] On Behalf Of jhartsho
> Sent: Monday, June 11, 2012 2:27 PM
> To: r-help@r-project.org
> Subject: [R] Kruskal Wallis Post hoc
>
> Hi, I have searched and found a response to a question similar to mine
> but
> when
Hi, I have searched and found a response to a question similar to mine but
when I tried the code, R says it's not an actual function so I thought I'd
ask here.
http://r.789695.n4.nabble.com/file/n4633035/Cookies.csv Cookies.csv
I have attached the data I am using. I am trying to look at two thi
gt;>> Thank you for the result, I will have a look at the link.
>>>
>>>
>>> Dr. Iasonas Lamprianou
>>> Department of Social and Political Sciences
>>> University of Cyprus
>>>
>>>
>>>> ___________
gt; Department of Social and Political Sciences
>> University of Cyprus
>>
>>
>>>
>>> From: Tal Galili <tal.galili@>
>>> To: Iasonas Lamprianou <lamprianou@>
>>> Cc: "r-help@" <r-help@>
>>> Sent: Th
> University of Cyprus
>
>
>>
>> From: Tal Galili <tal.galili@>
>>To: Iasonas Lamprianou <lamprianou@>
>>Cc: "r-help@" <r-help@>
>>Sent: Thursday, 12 January 2012, 10:48
>>Subject: Re: [R] kruskal w
sday, 12 January 2012, 10:48
>Subject: Re: [R] kruskal wallis post hoc?
>
>
>Hi Iasonas ,
>This is a stat question and not an R question.
>But the general answer is that it could happen :)
>
>
>The R question would have been if their is a Tukey HSD for kruskel.test,
Try to use "kruskalmc" in the package pgirmess
I give one of my results
> kruskal.test(rojos~mes)
Kruskal-Wallis chi-squared = 132.3091, df = 3, p-value < 2.2e-16
> kruskalmc(rojos~mes)
Multiple comparison test after Kruskal-Wallis
p.value: 0.05
Comparisons
obs.dif critical.dif
Hi Iasonas ,
This is a stat question and not an R question.
But the general answer is that it could happen :)
The R question would have been if their is a Tukey HSD for kruskel.test,
the answer is yes:
http://stats.stackexchange.com/questions/17342/is-there-a-nonparametric-equivalent-of-tukey-hsd
Dear all,
I run a kruskal wallis test and found significant results. Then, I conducted
all pairwise comparisons and found no significant results. Could anyone please
give me a hint as to why this happens or redirect me towards a specific web
page where I can find more info? (I used alpha=5% an
See the thread "stratified Wilcoxon available?" at
http://tolstoy.newcastle.edu.au/R/help/05/08/11143.html
Heinz
At 11:21 13.04.2010, Kay Cichini wrote:
hello everyone,
can anybody tell me if there is a kruskal-wallis, or another non-parametric
test, that can deal with multiple samples that
hello everyone,
can anybody tell me if there is a kruskal-wallis, or another non-parametric
test, that can deal with multiple samples that are stratified?
thanks,
kay
--
View this message in context:
http://n4.nabble.com/kruskal-wallis-stratified-tp1838210p1838210.html
Sent from the R help mai
Dear all,
I am using the Kruskal-Wallis test in R (kruskal.test()) to compare
non-normally distributed observations for 5 different groups. I now want to
perform multiple comparisons to identify the groups with significant
differences in the mean ranks. On searching the forum I found a number of
Hello.
We have some questions concerning the statistical analysis of a dataset.
We aim to compare the sample means of more than 2 independent samples; the
sample sizes are unbalanced. The requirements of normality distribution and
variance homogeneity were not met even after transforming the data
On Thursday 06 March 2008 10:18:18 am Melanie Müller wrote:
MM> Hello,
MM> I need nemenyi-test or any other post-hoc test for kruskal-wallis, but I
MM> just can't find out how to implement this in R.
MM> My data set is nitrite concentrations in four different groups which I
MM> intend to compare. T
Hello,
I need nemenyi-test or any other post-hoc test for kruskal-wallis, but I
just can't find out how to implement this in R.
My data set is nitrite concentrations in four different groups which I
intend to compare. The kruskal-wallis-test showed significance, but I
still don't know between whi
Hello,
I need nemenyi-test or any other post-hoc test for kruskal-wallis, but I
just can't find out how to implement this in R.
My data set is nitrite concentrations in four different groups which I
intend to compare. The kruskal-wallis-test showed significance, but I
still don't know between whi
Dear All,
I need to compare 4 groups of binary data having different sample sizes
and would like to know if the non parametric Kruskal-Wallis test
(kruskal.test) can be used for this purpose or not.
Many Thanks,
GK
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