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st: new dummy variable based on two categorical variables
From
"Delahanty, Ryan" <[email protected]>
To
"[email protected]" <[email protected]>
Subject
st: new dummy variable based on two categorical variables
Date
Sat, 16 Oct 2010 18:22:14 -0500
I had such awesome help from you stats ballers on this list with the last Q, I thought I'd take a spin again.
Please correct my language in this email if I'm off in proper terms.
Say I have two variables with i and j different levels, like this: var1=1,2,3,4; var2=1,2,3
And I want to get ORs on all 12 categories: 1,1; 1,2; 1,3; 2,1... 4,3.
What is the most efficient way to make a new categorical variable that contains all i x j combinations?
I know once complete, I want to do logistic this way:
xi, prefix(): logistic affec i.newvar
to get ORs.
Thanks again,
Ryan
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