Displaying 14 results from an estimated 14 matches similar to: "nlme: Initial parameter estimates"
2004 May 25
0
NLME
Hi everyone,
Does the selfstart function SSlogis of the "nlme" library  allows the introduction of time  varying covariates ?
For example how can I interpret the xmid parameter (reperesenting the age at which we reach the half of the asymptote) if I want to explain it by a some time varying covariate?
Thanks in adavance,
Abderrahim
Abderrahim Oulhaj, Phd in Statistics
Oxford
2004 Mar 12
0
Latent trait models
Hi,
I am looking for any  procedure in R to fit  "Latent variables models" in particular "Latent trait models (i.e. for binary data)". could anyone help me?
Many thanks ,
Dr Abderrahim Oulhaj
Oxford University
Department of Pharmacology
Mansfield Road
Oxford OX1 3QT
Tel:  +44 1865 224098
Fax: +44 1865 224099
Email: abderrahim.oulhaj@pharmacology.oxford.ac.uk
2005 Sep 12
1
Glmm for multiple outcomes
Dear All,
I wonder if there is an efficient way to fit the  generalized linear mixed model  for multivariate outcomes.
More specifically, Suppose that for a given subject i and at a  given time j we observe a multivariate  outcome Yij = (Y_ij1, Y_ij2, ..., Y_ijK). 
 where Y_ijk is a binomial(n_ijk, p_ijk). 
One way to jointly model  the data is to use the following specification:
g(p_ijk) =
2010 Oct 01
1
writing an R code for a given model
Dear R help list,
I am desperately looking for any reference explaining by examples how to
write  R codes in order to fit the parameters of a given model using maximum
likelihood or any other criteria function. I know the general structure:
First write a code for the maximum likelihood function and afterwards  write
a code to maximize it using optim and then invert the  Hessian  to get the
2010 Oct 07
1
Longitudinal multivariate data analysis
Dear all,
I am looking for an R package that fits multivariate gaussian or
non-gaussian longitudinal outcomes.
I am especially interested to non-gaussian outcomes  since the outcomes I've
got are discrete (some are binomial and some are count data).
Many thanks in advance,
Abderrahim
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2005 Dec 15
1
generalized linear mixed model by ML
Dear All,
I wonder if there is a way to fit a generalized linear mixed models (for repeated  binomial data)  via a direct Maximum Likelihood Approach. The "glmm" in the "repeated" package (Lindsey), the "glmmPQL" in the  "MASS" package (Ripley) and "glmmGIBBS"  (Myle and Calyton) are not using the full maximum likelihood as I understand. The
2006 Jan 03
1
lmer error message
Dear All,
I have the following error message when I fitted  lmer to a  binary data with the "AGQ" option:
Error in family$mu.eta(eta) : NAs are not allowed in subscripted assignments
In addition: Warning message:
IRLS iterations for PQL did not converge 
Any help?
Thanks in advance,
Abderrahim
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2005 Oct 11
0
random effects are mixture of normals
Dear All,
I wonder if there is an R package to estimate the generalized linear mixed models but with a random effects having  a mixture of normals as a prior distributinon ..
Thank you,
Abderrahim
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2009 Oct 06
0
Problem with NLTM package
Dear R users,
I have a question concerning the nltm package. Before posting to the R list I first contacted the author of the package twice but no succes. May be I've got the wrong email!  My question is about the object "surv" given in the package "nltm". As explained, the object "surv" represents the MLE estimates of the baseline survival function evaluated at
2009 Oct 08
0
Question on NLTM package
Dear all,
I didn't get any suggestion for my querry concerning the NLTM package so I am re-posting it hoping that someone can give me any clue. I apologize for doing so. Please find attached a copy of my previous email:
Dear R users,
I have a question concerning the nltm package. Before posting to the R list I first contacted the author of the package twice but no succes. May be I've
2016 Aug 05
2
A thought to improve IPRA
The code in X86TargetLowering::IsEligibleForTailCallOptimization() has this part:
  // The callee has to preserve all registers the caller needs to preserve.
  const X86RegisterInfo *TRI = Subtarget.getRegisterInfo();
  const uint32_t *CallerPreserved = TRI->getCallPreservedMask(MF, CallerCC);
  if (!CCMatch) {
    const uint32_t *CalleePreserved = TRI->getCallPreservedMask(MF, CalleeCC);
 
2016 Aug 16
2
A thought to improve IPRA
Hello Mentors,
I did analyze assembly files generated for IPRA + PGO.  (1) I observed that
I did not considered the scope of the optimization so changing callee saved
register set for non local function is bad because IPRA can not pass this
information to other modules.
(2) applying this change to indirect function also has no effect because
for such case IPRA is currently not able to propagate
2016 Jul 29
2
A thought to improve IPRA
----- Original Message -----
> From: "vivek pandya" <vivekvpandya at gmail.com>
> To: "Hal Finkel" <hfinkel at anl.gov>
> Cc: "llvm-dev" <llvm-dev at lists.llvm.org>, "Quentin Colombet"
> <qcolombet at apple.com>, "Mehdi Amini" <mehdi.amini at apple.com>
> Sent: Friday, July 29, 2016 5:02:44 AM
>
2016 Jul 29
0
A thought to improve IPRA
On Fri, Jul 29, 2016 at 9:01 AM, Hal Finkel <hfinkel at anl.gov> wrote:
> ----- Original Message -----
> > From: "vivek pandya" <vivekvpandya at gmail.com>
> > To: "Mehdi Amini" <mehdi.amini at apple.com>
> > Cc: "llvm-dev" <llvm-dev at lists.llvm.org>, "Hal Finkel" <hfinkel at anl.gov>,
> "Quentin