Basic file management -- How to write.table of, ranef()

Hello Jeremy,
Probably this could be done in more elegant manner, but here are my first
thoughts:
First of all, ranef.mer is not a proper table. That is, it consists of
several "tables" -- one per random effect.

Thus, you could chap off those
into separate tables and, voila, you can have proper data frame.

For example, consider a model with three random effects:
lmer1 <- lmer(y ~ x1 + x2 * x3 + (1|A) + (1|B) + (1|C), data=dat)

then, you can do following:
rA = as.data.frame(ranef(lmer1)$A)
rB = as.data.frame(ranef(lmer1)$B)
rC = as.data.frame(ranef(lmer1)$C)
(even 'as.data.frame(ranef(lmer1)[1])' should work)

Finally, you can do:
write.table(rA, 'file.txt', ..., ...)

All the best,
Petar

Hi all,

Apologies for asking such a simple question, but I have been trying to use
write.table to export the random-effect intercept estimates for a
straightforward two-level varying-intercept model using lme4.

For instance, after estimating the model, this code produces a list of the
estimated intercepts:

ranef(full.model)

Then I assign those estimates to an object:

random.intercepts <- ranef(full.model)

Whenever I try to use write.table to export those estimates, however, I
get an error message that the object cannot be coerced into a data frame.

File management is clearly not my strong suit, but am I assuming correctly
that there should be a relatively painless way of accomplishing this? ?Any
suggestions?

Thanks!