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Re: st: list x matrix


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: list x matrix
Date   Sat, 27 Mar 2010 13:46:33 -0700 (PDT)

--- On Sat, 27/3/10, richard boylan wrote:
> I have a list local var "x1 x2 x3 ...."
> 
> and a 1 x n matrix (vector)
> 
> b = (b1 b2 b3 ..)
> 
> How do I compute the new variable
> 
> z = b1*x1 + b2*x2 + b3*x3  + ...
> 
> I mean I know how to do that by writing the sum, there just
> has to be a better way of doing this.

Matrix operations are usually best done in Mata. However, it
is often not necessary to do them, e.g. the -xb()- function 
inside -nlpredict-, see -help nlpredict-.

Hope this helps,
Maarten

--------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany

http://www.maartenbuis.nl
--------------------------


      

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