The first part is right, but _not_ the second.
Once you have created the dummies, -xi- has no extra role to play.
Nick
[email protected]
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 <[email protected]> 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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