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st: Questions about matrix operations


From   "Wolff" <wolff@MAIL1.andrew.cmu.edu>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: Questions about matrix operations
Date   Mon, 17 Jun 2002 15:37:19 -0400

Hey folks,
I have a simple problem.  I have a regression with three variables.  I
would like to create a new variable equal to the sum of the estimated
coefficients times the variable values.  The coefficients are saved in
the matrix e(b).  I would like to do something like newvar=e(b)'*[var1
var2 var3].  Since e(b)' is 1X3 and the next matrix is 3X1, I thought it
would generate a scalar.  Is there an easy way to accomplish this?

Thanks,
Eric



Eric D. Wolff
Graduate School of Industrial Administration, Room 313
Carnegie-Mellon University
Tech and Frew
Pittsburgh, PA 15213
(412) 268-2939 (office)
(412) 268-6837 (fax)
email: wolff@andrew.cmu.edu
 

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