Thomas W Blackwell tblackw at umich.edu
Fri Apr 25 19:12:12 CEST 2003

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

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