Probably you've already found the function  step()  in the base
package, and its sub-functions  add1(), drop1().  See the help
for these.

-  tom blackwell  -  u michigan medical school  -  ann arbor  -

On Fri, 25 Apr 2003 edgar at uprm.edu wrote:

Hello,
Does anybody know where I can find an R function to carry out variable
selection using stepwise similar (or even better) to the stepwise function
available in S-Plus?. I have tried the mle.stepwise function available in
the wle package but I am not getting accurate results.
I have tried also the leaps package but it does not handle the options
f-in and f-out like in either MINITAB or SAS.

Thanks in advance

Dr. Edgar Acuna
University of Puerto Rico at Mayaguez