Hello, I'm trying to figure out how to run the stepAIC function starting with the NULL model. I can call the null model (e.g., lm(y ~ NULL)), but using this object in stepAIC doesn't seem to work.
The objective is to calculate AICc. This can be done if stepAIC can be run starting with the NULL model; the (2p(p-1)/(n-p-1))to get AICc would be added to the final step AIC value. Can anyone suggest how to run stepAIC beginning with the NULL model, and sequentially adding and removing variables (essentially a bottom-up approach)? Thanks, Josh Robins School of Fisheries and Ocean Sciences University of Alaska Fairbanks Juneau Center (206) 331-8633 [EMAIL PROTECTED] http://students.washington.edu/jbrobins ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
