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2011 Jun 22
1
lme convergence failure within a loop
...structure, across a spatial grid with data points collected at various time points within each grid cell. I'm trying to use a 'for' loop to try the model fit on each grid cell. In some cells lme does not converge, giving me the error: Error message: In lme.formula(logarea ~ year + summ_d, data = grid2, random = ~year + : nlminb problem, convergence error code = 1 message = iteration limit reached without convergence (9) When I get the error, the program aborts, and my loop stops. I'm not too worried about the error, as a generic mixed model structure may not be the b...