Hello,
I am using the gls function to model lake whitefish growth rates in response to selected climate variables. I am comparing models using AIC and I would also like to report the goodness of fit of each model. However, I am having difficulty finding a method that can be used with the gls function. For several of the models I am including an ARMA correlation to correct for temporal autocorrelation within the models and therefore cannot simply use the r-squared values within a linear model.
Do you have any advice on this matter or know of a method that I can use?
Any help/guidance would be greatly appreciated.
Regards,
Issac Hébert


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