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mm_struc
2018 Feb 26
0
How to model repeated measures negative binomial data with GEE or GLMM
...quot;log"))
I further tried to specify a compound symmetry covariance structure with
glmmTMB, but this failed:
m2a <- glmmTMB(Diract ~ DirPar*RecPar + offset(LnScan) + Year + cs(1|ID),
data=Direct,family=list(family="nbinom1",link="log"))
Warning message:
In fitTMB(TMBStruc) :
Model convergence problem; non-positive-definite Hessian matrix. See
vignette('troubleshooting')
I also tried Ben Bolker?s suggestion (posted on Nabble; see link above) to
use glmmPQL, but I got an error message:
m3 <- glmmPQL(Diract ~ Dir*Rec + offset(LnScan) + Year, random = ~...