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Message-ID: <86ea46f9-3d23-41ae-b9c8-ddecc8440cba@gmail.com>
Date: 2023-12-22T20:42:07Z
From: Ben Bolker
Subject: Unstructured Covariance Structure for lmer()
In-Reply-To: <76EAB835-EC72-4AB0-A0E5-435F48B46508@usc.edu>

"Unstructured" (aka 'general positive (semi)definite') covariance 
matrices are the *only* option in lme4.  If you give a little bit more 
detail/context about what you want to do, we may be able to help you better.

On 2023-12-22 3:00 p.m., Claire Campbell wrote:
> Hi -
> I was wondering how to implement an unstructured covariance structure in lmer(), is there code for that?
> Thank you!
> 
> 
> --
> 
> Claire Campbell
> Neuroscience PhD Candidate
> F31 NRSA Predoctoral Fellow
> Herting Neuroimaging Lab
> 
> USC Keck School of Medicine
> Department of Population and Public Health Sciences
> Los Angeles, CA, USA
> 
> 
> 	[[alternative HTML version deleted]]
> 
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