Displaying 1 result from an estimated 1 matches for "fm1igf".
2007 Jun 13
1
lme() doesn't converge on IGF example
Running the Chapter 4 examples in Pinheiro & Bates' "Mixed-Effects
Models in S and S-PLUS" (2000), I get a message that the default
optimizer doesn't converge, but using "optim" for the optimizer
results in convergence:
> > library(nlme)
> > fm1IGF.lis <- lmList(IGF)
> > fm1IGF.lme <- lme(fm1IGF.lis)
> Error in lme.formula(fixed = conc ~ age, data = IGF, random = list
> (Lot = c(-0.741604809797216, :
> nlminb problem, convergence error code = 1; message = iteration
> limit reached without convergence (9)
> >...