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LMER False Convergence (8)
2 messages · Daniel Anderson, Ben Bolker
Daniel Anderson <daniela at ...> writes:
Thanks again Ben, I went ahead and used the zip file from the link you sent to install lme4-3. This time I did not get the convergence warning. However, the verbose=T statement did not appear to work (i.e., it didn't print the iteration history). Probably not a big deal, but I thought it was odd and wondered if it might also not be printing the warning message despite having the same issue.
Well, this is a development version, so there might be something funny -- I'll check.
Below, I've placed my results from the same model for all three programs: HLM, lme4-2, and lme4-3. I also added the correlation between the variance components into this table, because with lme4-3 I get an estimated correlation between the random student intercept/slope of 1.0 (which was not the case with the other programs). So, at this point I think I'm going to run with lme4-2, and just ignore the convergence warning, unless you'd suggest otherwise?
That seems perfectly reasonable. Would it be possible for you
to send your data so we can have a look and see what's happening?
(Ideally you could send it in an anonymized form so that we could
use it for tests/examples in future versions of the package, but
for now just having it for private use among the lme4 developers
would be great.)
thanks
Ben