Stepwise Regression with no Origin
On 12.04.2011 21:52, Zd Gibbs wrote:
Sorry, the first version was incomplete. I'm trying again. I am running a regression equation and i want to enter in 12 IV then stepwise enter 8 variables and not have an origin. DV is "shfl". I want to enter in the following 12 independent dummy variables ajan bfeb cmar dapr emay fjun And then I want to enter in a stepwise fashion slag6 slag7 slag8 slag9 slag10 slag11 slag12 And finally, I want there to be no origin. I've done simple regression, but nothing quite like this.
See ?step which allows to specify minimal, maximal models as well as forward stepwise selection. BTW: Someone called Frank Harrell will shortly let you know about possible problems in model interpretation when using stepwise variable selection. Best, Uwe Ligges
I would appreciate your help. Thanks Zeda [[alternative HTML version deleted]]
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