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st: RE: Extracting specific elements from a matrix


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: Extracting specific elements from a matrix
Date   Mon, 5 Jul 2010 22:41:12 +0200

<>

Either talk to the coeff as "_b" (-help _variables-) or define a -matrix-
and extract from it:

***********
sysuse auto, clear
reg price weight length rep78

di _b[weight]

mat A=e(b)
di A[1,1]
***********


HTH
Martin


-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Dani Tilley
Sent: Montag, 5. Juli 2010 22:36
To: statalist@hsphsun2.harvard.edu
Subject: st: Extracting specific elements from a matrix

Hi,

I need to extract the first element of a matrix of coefficients and store it
on a variable, and repeat the process i times. I can set up the for loop and
do the storing, but I don't know how to access element [i,j] of a matrix A.

In particular, my matrix is e(b), the vector of coefficients from a
regression with k explanatory variables. I tried -e(b)[1,1]- but that didn't
take me far.

Any help is appreciated.

Thanks,
DF Tilley



      
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