Tuesday, 17 November 2009

lme false convergence

If you are using the R package lme4, and get error messages about "false convergence", then use the option verbose=TRUE in your call to lmer, and examine the output, which shows how the estimates of your betas change as the estimation proceeds. If you see any values for your betas are rather small, then divide that variable by 10 or 100 or 1000. This seems to help lmer to converge correctly.