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different covariance for different groups
2 messages · eva petkova, David Afshartous
Eva, There are several threads, search the words below and also see the summary I provided in the link. Cheers, David https://stat.ethz.ch/pipermail/r-sig-mixed-models/2007q3/000248.html random effect variance per treatment group in lmer heteroscedastic model in lme4 Stratifying level-1 variance with lmer() different random effects variances for outcomes and groups Behavior of coef() for lmer() model w/ level-2 variance stratified
On 03/04/2011 04:40 AM, eva petkova wrote:
Dear group, I would like to fit a model with random slope and intercept for each subject, but would like to have different random effects covariance for my two different groups. Can you tell me what is the syntax to do that? Thank you and my apologies for bothering you with this questions -- i am sure it is somewhere in the archives, but i could not find it. kind regards eva [[alternative HTML version deleted]]
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David Afshartous, Ph.D. Research Associate Professor School of Medicine Department of Biostatistics Vanderbilt University