8
votes
1answer
362 views

What is the difference between AIC() and extractAIC() in R?

The R documentation for either does not shed much light. All that I can get from this link is that using either one should be fine. What I do not get is why they are not equal. Fact: The stepwise ...
1
vote
1answer
501 views

How to plot AIC values when using the leaps package?

Does anybody know how to plot all AIC values for different size models, when using the command regsubsets from the package ...
6
votes
3answers
10k views

AIC or p-value: which one to choose for model selection?

I'm brand new to this R thing but am unsure which model to select. I did a stepwise forward regression selecting each variable based on the lowest AIC. I came up with 3 models that I'm unsure which ...