Displaying 20 results from an estimated 600 matches similar to: "levene.test"
2012 May 28
1
simulation of levene's test
hello,
I try to run simulation of levene's test to find the p-value but the error
of replacement has length zero occur, could anyone help me to fix this
problem?
asim <- 1000
pv<-rep(NA,asim)
for(i in 1:asim)
{print(i)
set.seed(i)
g1 <- rnorm(20,0,2)
g2 <- rnorm(20,0,2)
g3 <- rnorm(20,0,2)
x <- c(g1,g2,g3)
group<-as.factor(c(rep(1,20),rep(2,20),rep(3,20)))
library(Rcmdr)
2003 Aug 13
4
Levene test of homogeneity of variance
Has the Levene test of homogeneity of variance been implemented in any
library in R?
Thanks,
Maurice Haynes
National Institute of Child Health and Human Development
Child and Family Research Section
6705 Rockledge Drive
Bethesda, MD 20892
Voice: 301-496-8180
Fax: 301-496-2766
E-Mail: mh192j at nih.gov
2006 Aug 02
1
Syntax of Levene's test
Dear All
I am trying to use Levene's test (of package car), but I do not
understand quite well how to use it. '?levene.test' does not
unfortunately provide any example. My data are in a data frame and
correspond to 4 factors plus response. Could someone please give me an
example about how to use the command
levene.test(y, group)
?
Thanks in advance,
Paul
2007 Feb 20
1
bootstrapping Levene's test
Hello all,
I am low down on the learning curve of R but so far I have had little
trouble using most of the packages. However, recently I have run into
a wall when it comes to bootstrapping a Levene's test (from the car
package) and thought you might be able to help. I have not been able
to find R examples for the "boot" package where the test statistic
specifically uses a
2010 Mar 21
2
Levene's Test for Homogeneity of Variance
Hi, All!
To calculate Levene's Test for Homogeneity of Variance I use R Commander,
and this is the output:
> levene.test(Dataset$age, Dataset$sex)
Levene's Test for Homogeneity of Variance
Df F value Pr(>F)
group 1 0.8739 0.3567
33
I am not sure what means "Pr(>F)"? Can anyone explain/translate this?
Regards,
Iurie Malai
Department of Psychology and
2000 Sep 01
1
Levene's test
> From: Peter Dalgaard BSA <p.dalgaard at biostat.ku.dk>
> Date: 01 Sep 2000 09:54:59 +0200
>
> Prof Brian D Ripley <ripley at stats.ox.ac.uk> writes:
Important omission: specification from Murray Jorgensen
The test that I was thinking of basically does an anova on a modified
response variable that is the absolute value of the difference between an
observation
2010 Feb 15
1
Difference in Levene's test between R and SPSS
Hello,
I notice that when I do Levene's test to test equality of variances across
levels of a factor, I get different answers in R and SPSS 16.
e.g.: For the chickwts data, in R, levene.test(weight, feed) gives
F=0.7493, p=0.5896.
SPSS 16 gives F=0.987, p=0.432
Why this difference? Which one should I believe? (I would like to believe
R :)
Ravi
--
View this message in context:
2007 Jul 05
4
Levene Test with R
Hi All,
is there Levene' test in R ? If not ,Could you give me some
advice about Levene test with R?
Thanks a lot! I am waiting for yours.
2008 Feb 14
5
Levene's test for homogeneity of variances (befor using ANOVA)
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2006 Jun 27
2
Mauchly and Levene
Hallo!
I just started working with R to do the statistical analyses for my diploma thesis.
I got two sets of data.
Both contain repeated measures.
One has only one within-subject factor with four levels.
The other has one within-subject factor with two levels and one between-factor with two levels.
I want to compute a Mauchly test for both sets and a Levene test for the second set.
I
2018 Jan 15
0
About levene.test
Dear Mariano,
See the function leveneTest() in the car package.
I hope that this helps,
John
-----------------------------
John Fox, Professor Emeritus
McMaster University
Hamilton, Ontario, Canada
Web: socialsciences.mcmaster.ca/jfox/
> -----Original Message-----
> From: R-help [mailto:r-help-bounces at r-project.org] On Behalf Of Marcelo
> Mariano Silva
> Sent: Monday, January
2003 Nov 29
1
Classic Levene Test of variances
Hello,
I am searching for the classic Levene test of variances in R but I don't find the function. Is there any command or do I have to programm the test by myself? Does anybody know? Help would be fine because R is very new to me.
S.Zank
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2018 Jan 15
1
About levene.test
Hi,
What package(s) must I install so that I can apply the Levene' test in my
data?
I tried 'lawstat' but dependency ?VGAM? is not available for this package.
I am using Rstudio Version 1.1.383
Tks
[[alternative HTML version deleted]]
2006 Jul 21
2
seeking robust test for equality of variances w/ observation weights
Hello R community,
I am looking for a robust test for equality of variances that can take
observation weights.
I realize I can do the F-test with weighted variances, but I've read that
this test is not very robust.
So I thought about maybe adding a "weights" argument to John Fox's code for
the Levene Test (in the "car" library, "levene.test"),
substituting
2008 May 25
1
installing source package RGtk2 on mac os x 10.4.11
Dear All,
I'm trying to install the source package RGtk2
(RGtk2_2.12.5-3.tar.gz) on a i-Mac running os x 10.4.11:
Nome modello: iMac
Identificatore modello: iMac6,1
Nome processore: Intel Core 2 Duo
Velocità processore: 2.16 GHz
Numero di processori: 1
Numero totale di nuclei: 2
L2 Cache (per processore): 4 MB
Memoria: 2 GB
Velocità bus: 667 MHz
Versione Boot
2012 Jun 19
1
Stepwise Discriminant Analysis - greedy.wilks
I don't understand which is the problem
Could you help me please?
Thanks in advance
Marta
> str(data_indiciN2)
'data.frame': 200 obs. of 36 variables:
$ gruppo: Factor w/ 2 levels "0","1": 2 2 2 2 2 2 2 2 2 2 ...
$ I001N2: num 19.32 8.22 28.35 7.24 14.7 ...
$ I002N2: num 2.92 2.54 0.11 1.6 7.12 ...
$ I003N2: num -22.362 -0.222 -19.291
2005 Dec 20
2
Samba 3 user utility
We have started to use Samba v 3 under SuSe 10. Although I works fine, I'm
having some problems with setting up users. I have downloaded and tried
Webmin which works well.
Does anyone know of a utility that performs the simple functions that a
small network administrator wants -
Add/remove user (to both Linux and Samba)
Add/remove user to Samba (assuming existing Linux account)
2011 Feb 16
0
hel on leveneTest
Dear all,
For my research I need to perform a Levene's test on my data.I have not
large experience with this test and with R,so I have some problems to use
the leveneTest function. I read some previous posts on this topic but I
cannot understand what I have to do.
I have a five-columns data frame organised in the following way:
number of observation, number of subject, score, type of
2010 Mar 04
1
IMPORTANT! How work "constrOptim"? Why error in this routine???
? stato filtrato un testo allegato il cui set di caratteri non era
indicato...
Nome: non disponibile
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2006 Jun 04
1
How to use lmer function and multicomp package?
Dear list members,
First of all thank you for your helpful advices.
After your answeres to my firt mail I studied a lot (R-News n?5) and I
tried to perform my analysis:
First, to fit a GLM with a nested design I decided to use the function
"lmer" in package "lme4"
as suggested by Spencer Graves and Filippo Piro.
I remember to you that my data were:
land use classes, 3 levels