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initCtrl doesn't work as advertised in glmer.nb? #705

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bbolker opened this issue Oct 25, 2022 · 0 comments

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bbolker commented Oct 25, 2022

https://stackoverflow.com/questions/66293749/specify-theta-ml-parameters-within-glmer-nb/70601424#70601424 explains why you usually don't want to increase the iteration limit, but:

set.seed(101)
dd <- expand.grid(f1 = factor(1:3),
                       f2 = LETTERS[1:2], g=1:9, rep=1:15,
               KEEP.OUT.ATTRS=FALSE)
mu <- 5*(-4 + with(dd, as.integer(f1) + 4*as.numeric(f2)))
dd$y <- rnbinom(nrow(dd), mu = mu, size = 0.5)
m.nb <- glmer.nb(y ~ f1*f2 + (1|g), data=dd, verbose=TRUE, initCtrl = list(limit = 1000))

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