search for: daicc

...GAM (or I've not specified models correctly). Is my assessment of the GAMM performance reasonable? None of the models (GAM or GAMM) explain much of the deviance (~20%). I'm interested in an information-theoretic approach to selecting the best model from a set of possible models (AICc, dAICc, AICc weights), but cannot run some of the GAM models with GAM because they lack a random term. I'm not sure how to use the GAMM output to compare the models I can run with this procedure. Finally, as a last resort, I've subsampled the original data set so that I have 1 record per tra...

Dear R users, Could somebody please help me to find a way of comparing nonlinear, non-nested models in R, where the number of parameters is not necessarily different? Here is a sample (growth rates, y, as a function of internal substrate concentration, x): x <- c(0.52, 1.21, 1.45, 1.64, 1.89, 2.14, 2.47, 3.20, 4.47, 5.31, 6.48) y <- c(0.00, 0.35, 0.41, 0.49, 0.58, 0.61, 0.71, 0.83, 0.98,

...iate and also the Intercept. Each category within each variable was shown (I have attached an image of the table - the heading does not seem to match what is shown however). Their explanation of the variables was as follows: "A second model including these variables and wind speed reported a DAICc score <2; therefore, we model- averaged the parameter estimates included in these 2 best models (Table 3). Of the 5 habitats in which we observed plovers feeding, effect size was highest at artificial tidal ponds (5.52), followed by the intertidal zone (3.97). Positive effects of ephemeral pools...