search for: res2a

Dear helpers, I tried these models to run in the package nlme, but allways got the same error message... I have a correlation in 5 sessions within a field (n=12) with ten traps in one field. res2a <- lme(response~x+y+z+treatment),correlation = corARMA(form = ~ session|trapfield, p = 1, q = 0), random=~1|field, na.action=na.omit, data=plates, method="ML") res2a <- lme(response~x+y+z+treatment,correlation = corCAR1(form = ~ session|trapfield), random=~1|field, na.action=na.omi...