[ADMB Users] estimation of random effects correlations

Ben Bolker bbolker at gmail.com
Tue May 7 08:59:37 PDT 2013


On 13-05-07 03:46 AM, Mollie Brooks wrote:
> Hi Kristian,
> 
> The default is to fit uncorrelated random effects (a diagonal
> variance-covariance matrix), but it appears that you can fit them with a
> full variance-covariance matrix using the corStruct argument. I can not
> testify to how well this has been tested.
> 
> 
> |corStruct|	
> 
> a string specifying the covariance structure of the random effects
> vector. Two types of covariance matrices are currently
> implemented: |"diag"| (diagonal matrix) and |"full"| (positive definite
> matrix with all elements being estimated).

 This is **NOT** working yet.  I'm hoping to have it working soon.

  Ben

> 
> 
> cheers,
> Mollie
> 
> Mollie Brooks, PhD
> Postdoctoral Researcher, Population Ecology Research Group, Ozgul
> Lab, http://www.popecol.org
> Institute of Evolutionary Biology & Environmental Studies, University of
> Zürich
> 
> 
> 
> On 7 May 2013, at 9:39 AM, Kristian Kleinke <kmkleinke at gmail.com
> <mailto:kmkleinke at gmail.com>> wrote:
> 
>> Hi,
>>
>> just a short question I've been trying to find an answer to:
>> am I correct, that glmmadmb() cannot estimate correlations between
>> random effects?
>>
>> Thanks,
>> Kristian
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>> Users at admb-project.org <mailto:Users at admb-project.org>
>> http://lists.admb-project.org/mailman/listinfo/users
>>
> 
> 
> 
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