On Apr 29, 2011, at 7:17 PM, Jun Shen wrote:

Hi, Dennis,

Thanks for the reply. I tried to upgrade to R 2.13.0. Then when I tried to
load the library(nparcomp), I got an error

Error: package 'mvtnorm' is not installed for 'arch=i386'

What does that mean? Thanks.


You can see from Dennis' console output that 4 other packages are loaded when nparcomp is loaded. You have apparently not installed all of the needed packages for the new version of R. There is an argument to the install.packages function that will check for dependencies. Or perhaps you need to set that option in a GUI interface.

--
David.


Jun

On Fri, Apr 29, 2011 at 5:49 PM, Dennis Murphy <djmu...@gmail.com> wrote:

Hi:

Is this the function nparcomp() in the nparcomp package or the one
from the mutoss package? When using functions from packages, it is
useful to indicate the package name. I'm assuming you're using the
nparcomp package, because your code worked for me when that package
was loaded:

library(nparcomp)
Loading required package: multcomp
Loading required package: mvtnorm
Loading required package: survival
Loading required package: splines
nparcomp(Ulceration~Group,data=test,type='Dunnett',control='Non- treated')

 Nonparametric Multiple Comparison Procedure based on relative
contrast effects , Type of Contrast : Dunnett
NOTE:
*-------------------Weight Matrix------------------*
- Weight matrix for choosen contrast based on all-pairs comparisons

*-----------Analysis of relative effects-----------*
- Simultaneous Confidence Intervals for relative effects p(i,j)
    with confidence level 0.95
- Method = Multivariate Delta-Method (Logit)
- p-Values for  H_0: p(i,j)=1/2

*----------------Interpretation--------------------*
p(a,b) > 1/2 : b tends to be larger than a
*--------------Mult.Distribution-------------------*
- Equicoordinate Quantile
- Global p-Value
*--------------------------------------------------*
$weight.matrix

  < snipped for brevity - all zeros >

$Data.Info
     Sample Size
1     Duoderm   24
2     Fibrase   24
3 Kollagenase   24
4 Non-treated   24
5    Stimulen   24
6     Vehicle   24

$Analysis.of.relative.effects
                Comparison rel.effect confidence.interval t.value
1     p(Non-treated,Duoderm)        0.5   [ 0.499 ; 0.501 ]       0
2     p(Non-treated,Fibrase)        0.5   [ 0.499 ; 0.501 ]       0
3 p(Non-treated,Kollagenase)        0.5   [ 0.499 ; 0.501 ]       0
4    p(Non-treated,Stimulen)        0.5   [ 0.499 ; 0.501 ]       0
5     p(Non-treated,Vehicle)        0.5   [ 0.499 ; 0.501 ]       0
p.value.adjusted p.value.unadjusted
1                1                  1
2                1                  1
3                1                  1
4                1                  1
5                1                  1

$Mult.Distribution
Quantile p.Value.global
1 2.568766              1

$Correlation
[1] NA

A graphic also appears indicating zero effect, which is what one would
expect since Ulceration = 5 for every observation in the data frame.

sessionInfo()
R version 2.13.0 (2011-04-13)
Platform: x86_64-pc-linux-gnu (64-bit)

locale:
[1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C
[3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8
[5] LC_MONETARY=C              LC_MESSAGES=en_US.UTF-8
[7] LC_PAPER=en_US.UTF-8       LC_NAME=C
[9] LC_ADDRESS=C               LC_TELEPHONE=C
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C

attached base packages:
[1] splines stats graphics grDevices utils datasets methods
[8] base

other attached packages:
[1] nparcomp_1.0-1  multcomp_1.2-5  survival_2.36-9 mvtnorm_0.9-999
[5] sos_1.3-0       brew_1.0-6      plyr_1.5.2

loaded via a namespace (and not attached):
[1] tcltk_2.13.0 tools_2.13.0

Check your version of R and the nparcomp package against this. If you
have an older version of R or nparcomp, perhaps an upgrade is
sufficient to fix the problem.

HTH,
Dennis

On Fri, Apr 29, 2011 at 2:49 PM, Jun Shen <jun.shen...@gmail.com> wrote:
Dear list,

I tried to use the nparcomp to run some post hoc non-parametric
comparison
and got and error.

Error in uniroot(pfct, interval = interval) :
f() values at end points not of opposite sign

Appreciate any comments.

the command line:

nparcomp(Ulceration~Group,data=test,type='Dunnett',control='Non- treated')


Jun
===================================================================
data as follows

structure(list(Group = c("Duoderm", "Duoderm", "Duoderm", "Duoderm",
"Duoderm", "Duoderm", "Duoderm", "Duoderm", "Duoderm", "Duoderm",
"Duoderm", "Duoderm", "Duoderm", "Duoderm", "Duoderm", "Duoderm",
"Duoderm", "Duoderm", "Duoderm", "Duoderm", "Duoderm", "Duoderm",
"Duoderm", "Duoderm", "Fibrase", "Fibrase", "Fibrase", "Fibrase",
"Fibrase", "Fibrase", "Fibrase", "Fibrase", "Fibrase", "Fibrase",
"Fibrase", "Fibrase", "Fibrase", "Fibrase", "Fibrase", "Fibrase",
"Fibrase", "Fibrase", "Fibrase", "Fibrase", "Fibrase", "Fibrase",
"Fibrase", "Fibrase", "Kollagenase", "Kollagenase", "Kollagenase",
"Kollagenase", "Kollagenase", "Kollagenase", "Kollagenase",
"Kollagenase",
"Kollagenase", "Kollagenase", "Kollagenase", "Kollagenase",
"Kollagenase",
"Kollagenase", "Kollagenase", "Kollagenase", "Kollagenase",
"Kollagenase",
"Kollagenase", "Kollagenase", "Kollagenase", "Kollagenase",
"Kollagenase",
"Kollagenase", "Non-treated", "Non-treated", "Non-treated",
"Non-treated",
"Non-treated", "Non-treated", "Non-treated", "Non-treated",
"Non-treated",
"Non-treated", "Non-treated", "Non-treated", "Non-treated",
"Non-treated",
"Non-treated", "Non-treated", "Non-treated", "Non-treated",
"Non-treated",
"Non-treated", "Non-treated", "Non-treated", "Non-treated",
"Non-treated",
"Stimulen", "Stimulen", "Stimulen", "Stimulen", "Stimulen", "Stimulen", "Stimulen", "Stimulen", "Stimulen", "Stimulen", "Stimulen", "Stimulen", "Stimulen", "Stimulen", "Stimulen", "Stimulen", "Stimulen", "Stimulen", "Stimulen", "Stimulen", "Stimulen", "Stimulen", "Stimulen", "Stimulen",
"Vehicle", "Vehicle", "Vehicle", "Vehicle", "Vehicle", "Vehicle",
"Vehicle", "Vehicle", "Vehicle", "Vehicle", "Vehicle", "Vehicle",
"Vehicle", "Vehicle", "Vehicle", "Vehicle", "Vehicle", "Vehicle",
"Vehicle", "Vehicle", "Vehicle", "Vehicle", "Vehicle", "Vehicle"
), Ulceration = c(5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 5), Inflamation = c(3, 4, 3, 2, 3, 3, 4, 4, 2, 2, 3, 3,
3, 3, 3, 3, 3, 4, 3, 3, 3, 4, 3, 3, 2, 3, 3, 4, 3, 3, 2, 4, 4,
4, 4, 4, 4, 4, 3, 3, 4, 3, 5, 3, 3, 4, 4, 3, 3, 2, 4, 2, 3, 3,
4, 3, 4, 3, 3, 4, 3, 4, 2, 3, 3, 4, 2, 3, 4, 3, 2, 3, 3, 3, 2,
3, 2, 2, 2, 2, 4, 3, 2, 3, 3, 4, 3, 3, 4, 3, 4, 2, 4, 3, 4, 2,
4, 3, 4, 3, 2, 2, 2, 2, 3, 2, 3, 2, 4, 3, 2, 4, 4, 4, 2, 2, 3,
3, 2, 4, 3, 2, 3, 2, 2, 2, 4, 2, 3, 2, 3, 2, 3, 3, 3, 4, 3, 3,
4, 4, 2, 3, 2, 3), Fibroplasia = c(4, 4, 4, 4, 4, 3, 4, 4, 4,
3, 4, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 4, 2, 4, 4, 3,
2, 4, 4, 4, 4, 4, 4, 3, 3, 3, 4, 3, 3, 3, 4, 3, 4, 4, 4, 4, 4,
4, 4, 4, 4, 4, 4, 4, 4, 3, 4, 3, 3, 3, 4, 4, 3, 4, 4, 4, 3, 4,
4, 4, 4, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 4,
4, 4, 3, 4, 4, 3, 4, 3, 2, 3, 3, 4, 3, 3, 4, 4, 3, 3, 3, 4, 3,
3, 4, 4, 4, 4, 4, 4, 4, 3, 4, 4, 4, 3, 3, 4, 4, 4, 4, 4, 3, 4,
3, 4, 4, 4, 4, 4, 4, 4, 4), Fibrosis.and.Adexnal.Atrophy = c(4,
4, 4, 3, 4, 4, 4, 4, 4, 3, 4, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
4, 4, 3, 4, 3, 4, 4, 3, 3, 4, 4, 4, 4, 4, 4, 4, 3, 3, 4, 3, 4,
4, 4, 3, 4, 3, 3, 3, 3, 3, 4, 4, 4, 3, 4, 4, 4, 4, 4, 4, 3, 3,
4, 4, 3, 3, 4, 4, 3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 4, 4, 4,
4, 4, 3, 4, 4, 4, 3, 4, 3, 4, 3, 4, 4, 3, 4, 3, 2, 3, 3, 4, 4,
3, 4, 4, 3, 3, 3, 4, 3, 3, 4, 4, 4, 4, 4, 4, 4, 3, 4, 4, 4, 4,
3, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4), Inflammation = c(2,
2, 2, 1, 1, 1, 2, 3, 1, 2, 1, 1, 1, 1, 2, 1, 2, 2, 1, 1, 2, 1,
1, 1, 1, 1, 1, 1, 1, 2, NA, 1, 1, 1, 2, 2, 2, 1, 2, 1, 1, 2,
1, 1, 2, 1, 1, 2, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1,
1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
1, 1, 1, 1, NA, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 2, 1,
2, 1, 2, 2, 1, 1, 2, 1, 2, 2, 1, 1, 2, 1, 1, 1, 2, 1, 2, 1, 2,
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 2, 2), Fibroplasia.1 =
c(4,
4, 4, 4, 4, 3, 4, 4, 4, 3, 4, 3, 3, 3, 4, 4, 4, 4, 3, 3, 3, 3,
4, 4, 4, 4, 3, 3, 4, 3, NA, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3,
3, 3, 4, 4, 4, 4, 3, 3, 3, 3, 4, 4, 4, 3, 4, 3, 4, 4, 4, 4, 3,
3, 4, 4, 4, 3, 4, 3, 4, 4, 3, 4, 4, 3, 4, 4, 4, 4, 4, 4, 4, 4,
4, 3, 3, 3, NA, 4, 4, 4, 4, 3, 4, 3, 3, 3, 3, 3, 4, 2, 4, 3,
4, 4, 3, 4, 4, 2, 3, 2, 3, 3, 3, 3, 4, 4, 4, 4, 3, 3, 3, 3, 3,
4, 3, 3, 4, 4, 4, 4, 3, 3, 4, 3, 3, 4, 4, 4, 4, 3, 4, 4), Fibrosis = c(3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, NA, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 3, 3, 3, 3, 3,
3, 3, 3, 3, NA, 3, 3, 3, 3, 3, 2, 2, 3, 3, 3, 3, 3, 2, 3, 3,
3, 3, 3, 3, 3, 2, 3, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3), Total = c(25,
26, 25, 22, 24, 22, 26, 27, 23, 21, 24, 21, 22, 23, 25, 24, 25,
26, 23, 23, 24, 24, 24, 24, 21, 24, 20, 24, 24, 22, 12, 25, 25,
25, 26, 26, 26, 24, 22, 21, 24, 22, 24, 22, 25, 23, 25, 24, 22,
21, 24, 21, 24, 24, 25, 23, 25, 23, 24, 24, 24, 24, 20, 21, 24,
26, 21, 22, 25, 23, 21, 24, 23, 24, 23, 22, 23, 23, 22, 23, 25,
23, 23, 24, 24, 24, 23, 22, 17, 25, 25, 21, 25, 22, 25, 19, 24,
23, 22, 23, 21, 16, 22, 20, 25, 22, 22, 24, 25, 19, 21, 20, 25,
23, 20, 22, 25, 24, 23, 25, 24, 22, 22, 21, 23, 23, 23, 20, 24,
23, 24, 23, 23, 22, 24, 23, 23, 24, 26, 25, 23, 23, 24, 25)), .Names =
c("Group",
"Ulceration", "Inflamation", "Fibroplasia",
"Fibrosis.and.Adexnal.Atrophy",
"Inflammation", "Fibroplasia.1", "Fibrosis", "Total"), row.names = c(NA,
144L), class = "data.frame")

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PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
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David Winsemius, MD
West Hartford, CT

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