Displaying 1 result from an estimated 1 matches for "cd4years".
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addyears
2011 Jul 25
1
lme convergence error
...ime + genBI + genBI:time + PC1 + :
nlminb problem, convergence error code = 1
message = false convergence (8)
>From iteration to iteration, genBI is the only variable which changes and it
is a numerical variable equal to 1, 2, or 3 for a given IID. When I remove
the interaction term genBI:cd4years there is no problem with convergence.
Also, I have played around with scaling time (days to years, eg) which can
solve the problem but then leads to convergence issues in other iterations.
When I shift the time (say in units of years by +2) the model also
converges. So it seems like the genBI:time...