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st: RE: create predicted values manually using matrices


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: create predicted values manually using matrices
Date   Mon, 23 Nov 2009 18:54:19 -0000

Why not use -predict-? 

Nick 
n.j.cox@durham.ac.uk 

Joshua A. Shindell

I would like to create predicted values by multiplying my vector
of estimated coefficients my the matrix of data used in the sample.

I use the following code to extract my vector of coefficients after the
regression:
reg depvar indepvar1 indepvar2

matrix coeffs=e(b)
matrix list coeffs
matrix coeffs = coeffs'
matrix list coeffs
 
I have tried using the following code to extract my data values:
local varnames : rownames(coeffs)
local k = rowsof(coeffs)
matrix values = J(`k',1,1)

Where I am looking for some help is with filling the matrix named values
with the values of each variable for each observation so I can use the
values and the estimated coefficients to generate a predicted value.


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