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31098
2008 Mar 11
1
Problem comparing Akaike's AIC - nlme package
Hello,
I am comparing models made with nlme functions and non-nlme functions, based
on Akaike's AIC. The AIC values I get for exactly the same model formulation
--for example a linear model with no random effects fit with gls and lm,
respectively-- do not fit, although the values of the four model parameters
are exactly the same. For example:
m1 <- gls(height ~ age, data = Loblolly)
m2