[R-sig-ME] logistic model with exponential decay

[Stijn Ruiter]

Hi all,
Frederik is right. Do you think such a model can be estimated using 
nlmer? How?
Stijn

-- 
Best regards,

Stijn Ruiter
Department of Sociology / ICS
Radboud University Nijmegen
P.O. Box 9104
6500 HE Nijmegen
Netherlands

Phone: + 31 24 361 2272
Fax:   + 31 24 361 2399

Visiting address:
Thomas van Aquinostraat 4.01.71
Nijmegen

website: http://oase.uci.ru.nl/~sruiter



Fredrik Nilsson schreef:
> Dear Ben,
>
> Does it? I interpret Stijn's model as:
> logit(y) ~ alpha + beta*x + exp(-T/beta) + possibly multiple error
> terms (sample within muscle within toad or some non-nested terms)
>
> which I would find difficult to squeeze into the glmm framework.
>
> Best regards,
> Fredrik Nilsson
>
> ------------------------
> Competence Centre for Clinical Research,
> Lund University Hospital, 221 85 Lund, Sweden
>
> 2008/12/21 Ben Bolker <bolker at ufl.edu>:
>   
>> Stijn Ruiter wrote:
>>     
>>> Dear list,
>>> In SAS I am using NLMIXED to estimate a logistic model that includes
>>> exponential decay. Since NLMIXED only allows for a single random
>>> statement, I would like to switch to R. Could anyone suggest how to
>>> estimate such a model? I cannot find a clear example for estimating
>>> these kinds of models with nlmer.
>>> I'd like to estimate a logistic model for my dichotomous dependent
>>> variable that includes both linear terms and EXP(-Time/Beta).
>>> Thanks,
>>> Stijn
>>>
>>>       
>>  it sounds like
>>
>> lmer(...,family=binomial(link="log"))
>>
>>  -- i.e., a GLMM rather than a NLMM
>>
>>  Ben Bolker
>>
>> --
>> Ben Bolker
>> Associate professor, Biology Dep't, Univ. of Florida
>> bolker at ufl.edu / www.zoology.ufl.edu/bolker
>> GPG key: www.zoology.ufl.edu/bolker/benbolker-publickey.asc
>>
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