Step procedure and Akaike information criterion
compare ?AIC with ?extractAIC, which explains the difference.
On 20/09/06, Emilia Rocco <rocco at ds.unifi.it> wrote:
Please can you help me
I have the following problem:
I have selected an lm model through the step procedure which visualize for each step the AIC value; then I have calculated for the initial model and the selected one the AIC using the funnction AIC. The results are different.What's happened?
Emilia Rocco
Dipartimento di Statistica "G. Parenti"
Universit? di Firenze
e-mail: rocco at ds.unifi.it
[[alternative HTML version deleted]]
______________________________________________ R-help at stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
================================= David Barron Said Business School University of Oxford Park End Street Oxford OX1 1HP