[R-sig-ME] Weird behaviour of mcmcsamp & glmer

[Bernd Weiss]

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library(lme4)
m1 <- glmer(cbind(incidence, size - incidence) ~ period + (1 | herd),
~            family = binomial, data = cbpp)
fixef(m1)  ## first call
tmp <- mcmcsamp(m1, 1000)
fixef(m1)  ## second call

The fixed effects (m1) before and after the use of mcmcsamp differ
considerably. Why?

TIA,

Bernd

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