Displaying 12 results from an estimated 12 matches for "i09".
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2013 Feb 09
1
Troubleshooting underidentification issues in structural equation modelling (SEM)
Hi all, hope someone can help me out with this.
Background Introduction
I have a data set consisting of data collected from a questionnaire that I
wish to validate. I have chosen to use confirmatory factor analysis to
analyse this data set.
Instrument
The instrument consists of 11 subscales. There is a total of 68 items in
the 11 subscales. Each item is scored on an integer scale between 1 to 4.
2010 Jun 07
1
Desolve package: How to pass thousand of parameters to C compiled code?
Hi,
I have used DeSolve package for my ODE problem regarding infectious disease transmission and currently am trying to pass lots (roughly a thousand) of model parameters to the C compiled model (I have to use C compiled code instead of R code purely because of the speed).
I can't go define it one by one as it gonna take ages to finish and also quite difficult to revise. I have read the
2009 Sep 17
2
SVM
Hello,
I have 12 sample each sample has got 1000 observation, i.e I have a matrix X with 1000 rows and 12 columns!
m <- svm(t(X))
p <- predict (m)
Can anyone tell me how to use svmtrain() in R!
Many Yhanks,
Samuel
[[alternative HTML version deleted]]
2012 Nov 20
2
about MCMC
Hello all, could you tell wehere I can find information related to MCMC
(Monte Carlo).
And some examples about this topic.
Thanks,
Tania
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2010 Jul 28
1
Time-dependent covariates in survreg function
Dear all,
I'm asking this question again as I didn't get a reply last time:
I'm doing a survival analysis with time-dependent covariates. Until now,
I have used a simple Cox model for this, specifically the coxph function
from the survival library. Now, I would like to try out an accelerated
failure time model with a parametric specification as implemented for
example in the survreg
2008 Dec 12
1
Support vector model?
Dear All,
Apologies for sending this email to both list, but at this point I'm not
sure which one could help me the most.
I have 4 sets of data, 1 test and 3 different sets of controls.
The measurements are binary, with a matrix of 0 and 1
I'm measuring across time (rows, ~815) the behaviour of organelles in
the cell by microscopy in response to different stimuli (several
measurements
2010 Apr 26
1
finite difference scheme for 2D differential equations
Hello everyone,
I am trying to solve 2D differential equations using finite difference
scheme in R. I have been able to work with the equations with only one
spatial dimensions but I want to extend it to the two dimensional problem.
For example i can simulate one dimensional diffusion using a code like the
following. But I want to write a similar code for,say, a two dimensional
diffusion
2011 Nov 11
3
multivariate modeling codes
HI,
I am relatively new to R and would appreciate some help or directions for
this.
I am trying to model 3 longitudinal outcomes jointly and to identify some
predictors for these 3 joint outcomes (all continuous). I am trying to find
some codes that I may modify to do this but cannot seem to find anything.
--
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2010 Apr 06
1
estimating the starting value within a ODE using nls and lsoda
All-
I am interested in estimating a parameter that is the starting value for an ODE model.
That is, in the typical combined fitting procedure using nls and lsoda (alternatively rk4), I first defined the ODE model:
minmod <- function(t, y, parms) {
G <- y[1]
X <- y[2]
with(as.list(parms),{
I_t <- approx(time, I.input, t)$y
dG <- -1*(p1 + X)*G +p1*G_b
dX <-
2009 Sep 01
1
Logistic Politomic Regression in R
...,000 items. My training set is 30,000
> examples of 80 variables, so I have no idea what the 10,000 items represent.
Presumably, the coefficients of the support vectors times the training
labels, see help("svm", package = "e1071"). See also
http://www.jstatsoft.org/v15/i09/
for some background information and the different formulations available.
> There should be some attribute that lists the "weights" for each of the 80
> variables.
Not sure what you are looking for. Maybe David, the author auf svm() (and
now Cc), can help.
Z
> --
> Noah
&...
2010 Oct 31
1
R-help Digest, Vol 92, Issue 31
...a@gmail.com> wrote:
> Does any R package support one-class SVM?
> I'm trying to develop an application to detect anomalies in genome
> sequencing.
I'm pretty sure kernlab supports this:
http://cran.r-project.org/web/packages/kernlab/index.html
And:
http://www.jstatsoft.org/v11/i09/paper
-steve
--
Steve Lianoglou
Graduate Student: Computational Systems Biology
?| Memorial Sloan-Kettering Cancer Center
?| Weill Medical College of Cornell University
Contact Info: http://cbio.mskcc.org/~lianos/contact
------------------------------
Message: 61
Date: Fri, 29 Oct 2010 17:20...
2008 Jun 30
4
Rebuild of kernel 2.6.9-67.0.20.EL failure
Hello list.
I'm trying to rebuild the 2.6.9.67.0.20.EL kernel, but it fails even without
modifications.
How did I try it?
Created a (non-root) build environment (not a mock )
Installed the kernel.scr.rpm and did a
rpmbuild -ba --target=`uname -m` kernel-2.6.spec 2> prep-err.log | tee
prep-out.log
The build failed at the end:
Processing files: kernel-xenU-devel-2.6.9-67.0.20.EL
Checking