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RE: st: variable name


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: variable name
Date   Mon, 4 May 2009 17:24:52 +0100

The first part is right, but _not_ the second. 

Once you have created the dummies, -xi- has no extra role to play. 

Nick 
n.j.cox@durham.ac.uk 

MAY BAYDOUN

I think you need to multiply the original variables first and then place an i. next to that new variable.

gen Irs1234567_1Xrs7654321=rs1234567*rs7654321

xi: logit case sex i.Irs1234567_1Xrs7654321, or

On Mon, 5/4/09, Qiang (Danny) Chen <qiangchen@mail.nih.gov> wrote:

> When I use xi (Interaction
> expansion), I got the following report. I am wondering if
> there is a way to keep the original snp names. For example:
> 
> _Irs1Xrs~1_1  ==> _Irs1234567_1Xrs7654321_1
> 
> 
> Thanks! 
> 
> xi: logit case sex i.rs1234567*i.rs7654321, or

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