Dear R-Helpers,
I want to perform a logistic regression on my dataset (y).
I used the following code:
logistic<-glm(formula="interest_variable"~.,family = binomial(link = logit),
data = y)
This run correctly.
Then i want to develop the logistic regression with three different method:
-forward
-backward
-stepwise
I used these procedure:
forward<-step(logistica,direction="forward")
backward<-step(logistica,direction="backward")
stepwise<-step(logistica,direction="both")
Even these run correctly, but i obtained the same results with the three
different procedures.
Then I tought i made some mistakes.
My question is:
Is correct what i did?
Is correct that three different methods return the same results?
If i made some mistakes, what is the correct method to correctly perform the
three different logistics regression?
Thank you in advance.
Sergio Della Franca.
[[alternative HTML version deleted]]
______________________________________________
R-help@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.
