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st: Using # sign with factor variables to create interactions
From
"Weichle, Thomas" <[email protected]>
To
<[email protected]>
Subject
st: Using # sign with factor variables to create interactions
Date
Fri, 6 Aug 2010 11:11:31 -0500
Hi Statalisters,
I'm using the new # sign notation with factor variables to create
interactions. I would like to do post model linear combinations with
the lincom command. Since the level indicator variables are not created
in the dataset (or memory I believe), how do I do linear combinations
after running a model that incorporated an interaction using the # sign
notation (ex. smoker#agegrp)? I've discovered that I could just change
the base level in order to see different linear combinations but this
requires running new models for each combination I want. Is this the
best way to do it with the new notation?
Tom Weichle
Math Statistician
Center for Management of Complex Chronic Care (CMC3)
Hines VA Hospital, Bldg 1, C202
708-202-8387 ext. 24261
[email protected]
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