Likelihood drops on adding random effect
Murray Jorgensen <maj at ...> writes:
*I tried using 'update' which should (I believe) initialise at the simpler model:
f0128biu = update(f0128bi, . ~ . + (1|tree))
Error in model.frame.default(formula = fincr ~ icfac + (1 + gap) + (1 + : invalid type (closure) for variable 'box' Murray
It's not really shocking to me that update() doesn't work, fiddling with random effects formulas can be tricky. Are you willing to post data somewhere (or e-mail it to me)? Ben Bolker