st: Re: Calculating Determinant of Hessian Matrix Over Obervations

["Michael Blasnik" <michael.blasnik@verizon.net>]

listed, then why not just calculate it directly using -gen-?

gen det=A*C-B^2

Michael Blasnik


----- Original Message ----- 
From: "Asgar Khademvatani" <akhademv@ucalgary.ca>
To: <statalist@hsphsun2.harvard.edu>
Sent: Monday, October 01, 2007 7:34 AM
Subject: st: Calculating Determinant of Hessian Matrix Over Obervations



> Dear All,
>
> I have 43 observation on t he variables  A, B, and C. I am trying to
> make 43 symmetry Hessian matrix(2 by 2) and calculate each matrix
> determinant and list the calculated determinants for each observation. I
> have made the following loop but it is subject to error as follows;
>
> forvalues i = 1/43 {
>    matrix H = (A[`i'], B[`i'] \ B[`i'], C[`i'])
>   gen det_H =  det(H)
>    di "`i'"
>     matrix list Ha_g_1
>    list det_H
>    }
> I am getting the following error as follows;
>
>    +----------+
>     | det_H |
>     |----------|
>  1. | 6.28e-13 |
<snip>

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