On Tue, 11 Apr 2006, Mike Wolfgang wrote:
Probably it is not highly relevant question: Why do stepwise regression
functions in R (step() or stepAIC()) add/delete categorical variables as a
set?
Yes, those two do. Others (e.g. in package leaps) may not.
For example, I have a four-level
Dear All,
Probably it is not highly relevant question: Why do stepwise regression
functions in R (step() or stepAIC()) add/delete categorical variables as a
set? For example, I have a four-level factor variable d, so dummies are
d1,d2,d3, as stepwise regression operates d, adding or removing,
Mike Wolfgang wrote:
Dear All,
Probably it is not highly relevant question: Why do stepwise regression
functions in R (step() or stepAIC()) add/delete categorical variables as a
set? For example, I have a four-level factor variable d, so dummies are
d1,d2,d3, as stepwise regression operates
