Displaying 20 results from an estimated 1000 matches similar to: "quasibinomial glm"
2001 Jul 10
1
R.lib and compiling C for Windows
Hello list,
(PC Windows 2000, R 1.2.3)
i want to compile C source file for R on windows 2000. I'm working
with Metrowerks CodeWarrior for creating and compiling C files. I've
see that R.lib file must be obtain with R.ddl by Visual C++. I don't
have Visual C++ (and i don't want to buy it !!) but i want to obtain
R.lib file. Is there a solution to my problem ???
Any help would
2001 May 29
3
geary statistics
Hello,
i' m looking for a function to compute geary statistic for spatial correlation.
Thanks.
--
St?phane DRAY
---------------------------------------------------------------
Biom?trie et Biologie ?volutive - Equipe "?cologie Statistique"
Universite Lyon 1 - Bat 711 - 69622 Villeurbanne CEDEX - France
Tel : 04 72 43 27 56 Fax : 04 78 89 27 19
04 72 43 27 57 E-mail
2001 Sep 06
1
svd and eigen
Hello List,
i need help for eigen and svd functions. I have a non-symmetric
square matrix. These matrix is not positive (some eigenvalues are
negative). I want to diagonalise these matrix. So, I use svd and
eigen and i compare the results. eigen give me the "good" eigenvalues
(positive and negative). I compare with another software and the
results are the same. BUT, when i use svd,
2002 Jul 18
2
RODBC and Excel Files
Hello,
I am trying to play with RODBC library and Excel Files. In my file
(doubs.xls) there are 2 spreadsheets:
> library(RODBC)
> connection<-odbcConnect("Excel Files")
> sqlTables(connection)
TABLE_CAT TABLE_SCHEM TABLE_NAME TABLE_TYPE REMARKS
1 F:\\Th?se\\R\\Doubs NA Faune$ SYSTEM TABLE NA
2 F:\\Th?se\\R\\Doubs NA Milieu$
2003 Jun 26
0
Votre courrier est rejeté
A L E R T E V I R U S
Notre antivirus a d?tect? le VIRUS "W32/Sobig.e at MM" dans votre
courrier destin? ? :
-> dray at biomserv.univ-lyon1.fr
Nous refusons de le transmettre.
Nous vous conseillons de d?contaminer votre poste de travail.
Pour votre information, vous trouverez ci-dessous les entetes de votre
message
Pour des
2003 Jul 03
1
How to use quasibinomial?
Dear all,
I've got some questions, probably due to misunderstandings on my behalf, related
to fitting overdispersed binomial data using glm().
1. I can't seem to get the correct p-values from anova.glm() for the F-tests when
supplying the dispersion argument and having fitted the model using
family=quasibinomial. Actually the p-values for the F-tests seems identical to the
p-values for
2007 Sep 19
1
lmer using quasibinomial family
Dear all, I try to consider overdispersion in a lmer model. But using
family=quasibinomial rather than family=binomial seems to change the fit but
not the result of an anova test. In addition if we specify test="F" as it is
recomanded for glm using quasibinomial, the test remains a Chisq test. Are
all tests scaled for dispersion, or none? Why is there a difference between
glm and lmer
2006 May 10
1
Allowed quasibinomial links (PR#8851)
Full_Name: Henric Nilsson
Version: 2.3.0 Patched (2006-05-09 r38014)
OS: Windows 2000 SP4
Submission from: (NULL) (83.253.9.137)
When supplying an unavailable link to `quasibinomial', the error message looks
strange. E.g.
> quasibinomial("x")
Error in quasibinomial("x") : 'x' link not available for quasibinomial family,
available links are "logit",
2012 Feb 07
1
binomial vs quasibinomial
After looking at 48 glm binomial models I decided to try the quasibinomial
with the top model 25 (lowest AIC). To try to account for overdispersion
(residual deviance 2679.7/68 d.f.) After doing so the dispersion factor is
the same for the quasibinomial and less sectors of the beach were
significant by p-value. While the p-values in the binomial were more
significant for each section of the
2007 Jun 29
0
acf and na.pass
Hello,
I would like to have some information about acf with missing values.
Let us consider this example:
x=rnorm(100)
x2=x
x2[sample(100,10)]=NA
acf1=acf(x)
acf2=acf(x2,na.action=na.pass)
The computation of the acf is different for the two data sets. Looking
at the the code reveals that with missing values, the computation of acf
takes into account the number of pairs of non-NA values (i.e.
2008 Apr 01
1
superimpose histogram on biplot
Hi all,
I've been trying to figure out how to superimpose a histogram on a
biplot that shows the relative contribution of each axis. I have
been using the NIPALS function (http://biomserv.univ-lyon1.fr/~dray/
files/softwares/nipals.R) to run principal component analyses. Here
is a toy example.
source("http://biomserv.univ-lyon1.fr/~dray/files/softwares/nipals.R")
2006 Oct 18
1
latin1,utf-8...encoding and data
Hello,
I have some questions concerning encoding and package distribution. We
develop the ade4 package. For some data sets included in the package,
there are accentued character (e.g. ?,?...). The data sets have been
saved using latin1 encoding, but some of us use utf-8 and can not see
some data sets which contains accented chracters.
e.g:
librarry(ade4)
data(rankrock)
rankrock
in this case,
2007 Nov 16
1
Efficient way to compute power of a sparse matrix
Dear all,
I would like to compute power of a square non symmetric matrix. This is
a part of a simulation study. Matrices are quite large (e.g., 900 by
900), and contains many 0 (more than 99 %). I have try the function
mtx.exp of the Biodem package:
library(Biodem)
m <- matrix(0, 900, 900)
i <- sample(1:900, 3000, replace = T)
j <- sample(1:900, 3000, replace = T)
for(x in 1:3000)
2012 Feb 07
0
GLM Quasibinomial - 48 models
I've originally made 48 GLM binomial models and compare the AIC values. But
dispersion was very large:
Example: Residual deviance: 8811.6 on 118 degrees of freedom
I was suggested to do a quasibinomial afterwards but found that it did not
help the dispersion factor of models and received a warning:
Residual deviance: 3005.7 on 67 degrees of freedom
AIC: NA
Number of Fisher Scoring
2009 Mar 02
2
Unrealistic dispersion parameter for quasibinomial
I am running a binomial glm with response variable the no of mites of two
species y->cbind(mitea,miteb) against two continuous variables (temperature
and predatory mites) - see below. My model shows overdispersion as the
residual deviance is 48.81 on 5 degrees of freedom. If I use quasibinomial
to account for overdispersion the dispersion parameter estimate is 2501139,
which seems
2009 Oct 02
1
confint fails in quasibinomial glm: dims do not match
I am unable to calculate confidence intervals for the slope estimate in a
quasibinomial glm using confint(). Below is the output and the package info
for MASS. Thanks in advance!
R 2.9.2
MASS 7.2-48
> confint(glm.palive.0.str)
Waiting for profiling to be done...
Error: dims [product 37] do not match the length of object [74]
> glm.palive.0.str
Call: glm(formula = cbind(alive, red) ~ str,
2007 Nov 07
1
strwidth and strheight for rotated text
Dear All,
I would like to plot text with a box around it. I used strwidth and
strheight to compute the size of the box which is plotted with rect:
z <- rnorm(10)
# horizontal text works
plot(rnorm(10))
x1 <- 5
y1 <- 0
label <- "Label"
cha <- paste(" ", label, " ", sep = "")
xh <- strwidth(cha, cex = par("cex"))
yh <-
2008 Oct 26
0
LMER quasibinomial
Hi,
a while ago I posted a question regarding the use of alternative models,
including a quasibinomial mixed-effects model (see Results 1). I rerun the
exact same model yesterday using R 2.7.2 and lme4_0.999375-26 (see Results
2) and today using R 2.7.2 and lme4_0.999375-27 (see Results 3).
While the coefficient estimates are basically the same in all three
regressions, the estimated standard
2007 Jan 08
1
Cross-compilation of R and ld bug ?
Hello list,
I would like to cross-compile R packages using R 2.4.0. I am working on
Linux Debian and cross-compiled (windows binaries) without problems with
older R version.
I have used the doc of Yan and Rossini in the contributed section of the
R documentation (same version of MinGW...).
When I try to cross-compile R (make R), the procedure stopped and returns :
2008 May 07
2
Estimating QAIC using glm with the quasibinomial family
Hello R-list. I am a "long time listener - first time caller" who has
been using R in research and graduate teaching for over 5 years. I
hope that my question is simple but not too foolish. I've looked
through the FAQ and searched the R site mail list with some close hits
but no direct answers, so...
I would like to estimate QAIC (and QAICc) for a glm fit using the