[R-sig-ME] fitting mixed effects logistic regression with weights

[Gebregziabher, Mulugeta]

So, how do we get comparable estimates/inference to Proc GLIMMIX of SAS?
________________________________________
From: Ben Bolker [bbolker at gmail.com]
Sent: Friday, June 10, 2011 4:45 PM
To: Gebregziabher, Mulugeta
Cc: r-sig-mixed-models at r-project.org
Subject: Re: [R-sig-ME] fitting mixed effects logistic regression with weights

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On 06/10/2011 04:44 PM, Gebregziabher, Mulugeta wrote:
> Dear Ben,
>
> Thank you for your prompt response.  Does MCMCglmm provide the usual
> REML/RSPL estimates or Bayesian estimates for the fixed effects? I
> mean are the coefficient and SE estimates REML/RSPL or Bayesian? I
> want to be sure what I am getting.

  Bayesian.

>
> Mulugeta ________________________________________ From:
> r-sig-mixed-models-bounces at r-project.org
> [r-sig-mixed-models-bounces at r-project.org] On Behalf Of Ben Bolker
> [bbolker at gmail.com] Sent: Friday, June 10, 2011 4:33 PM To:
> r-sig-mixed-models at r-project.org Subject: Re: [R-sig-ME] fitting
> mixed effects logistic regression with  weights
>
> On 06/10/2011 04:24 PM, Gebregziabher, Mulugeta wrote:
>> Dear all,
>>
>> I have been trying to fit a logistic regression model with random
>> intercept for survey sampled data using the lmer in the lme4
>> package. I also want to get HPD intervals. I tried family=binomial
>> as well as family=quasibinomial. I am encountering the following
>> errors. "Eror in .local(object, n, verbose, ...) : Update not yet
>> written" and "Error in HPD interval(mcmcsamp(fit, 1000)) :   error
>> in evaluating the argument 'object' in selecting a method for
>> function 'HPDinterval'.
>
> As the error message suggests (obliquely!), mcmcsamp() does not yet
> work for GLMMs (i.e. [g]lmer with 'family' specified).  Furthermore,
> quasi-likelihood fitting no longer works with the latest releases of
> lme4 (because the author decided that he didn't really understand
> what it was doing, hence safer to omit it).
>
> Have you considered MCMCglmm, or parametric bootstrapping
> (help("simulate-mer")) ?
>
>
> See more below:
>>
>> Does anyone know how to go around this problem? Thanks.
>>
>>> library(lme4)
>> Loading required package: Matrix Loading required package: lattice
>> Attaching package: 'Matrix' The following object(s) are masked
>> from 'package:base': det Attaching package: 'lme4' The following
>> object(s) are masked from 'package:stats': AIC
>>> attach(cohort)
>>>
>>> f  <- a1cge8 ~  (1|id)   +  time  +  nhb  + hispanic  + other  +
>>> male  + mstat  +svcpct   +urban   +  comor1   +comor2  + comor3
>>>
>>>
>>> est        <- round(slot(summary(fit), "coefs")[,1], digits=2) t
>>> <- slot(summary(fit), "coefs")[,3] df      <- c(1, 1, 3, 3, 3,
>>> 1, 1, 1, 1, 3, 3, 3) p.value    <- ifelse(t<0, round(pt(t,
>>> df=df), digits=3), round(1-pt(t, df), digits=3) ) se         <-
>>> round(slot(summary(fit), "coefs")[,2], digits=4) ci         <-
>>> HPDinterval(mcmcsamp(fit, 1000))
>> Error in .local(object, n, verbose, ...) : Update not yet written
>> Error in HPDinterval(mcmcsamp(fit, 1000)) : error in evaluating
>> the argument 'object' in selecting a method for function
>> 'HPDinterval'
>>> lower <- round(ci$fixef[,1], digits=2)
>> Error: object 'ci' not found
>>> upper <- round(ci$fixef[,2], digits=2)
>> Error: object 'ci' not found
>> __________________________________________ Mulugeta Gebregziabher,
>> PhD Assistant Professor Division of Biostatistics and Epidemiology
>> 135 cannon St. Suite 303 Charleston, SC 29425 Tel: 843-876-1112;
>> Fax: 843-876-1126 E-mail: gebregz at musc.edu
>> _______________________________________________
>> R-sig-mixed-models at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-sig-mixed-models
>
> _______________________________________________
> R-sig-mixed-models at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-sig-mixed-models

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