[R] AIC v. extractAIC

From: Ryan Briscoe Runquist <rdbriscoe_at_ucdavis.edu>
Date: Thu, 6 Dec 2007 16:14:17 -0800 (PST)


I am using a simple linear model and I would like to get an AIC value. I came across both AIC() and extractAIC() and I am not sure which is best to use. I assumed that I should use AIC for a glm and extractAIC() for lm, but if I run my model in glm the AIC value is the same if I use AIC() on an lm object. What might be going on? Did I interpret these functions incorrectly?


Ryan D. Briscoe Runquist
Population Biology Graduate Group
University of California, Davis

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