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Re: st: how to define a matrix with mathematical expression


From   Nick Cox <njcoxstata@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: how to define a matrix with mathematical expression
Date   Mon, 10 Sep 2012 13:27:07 +0100

I think you are correct. If your matrix is a matrix of partial
derivatives, you have to do any calculus derivations yourself.

Nick

On Mon, Sep 10, 2012 at 1:22 PM, Nina YIN <yinnina.ccer@gmail.com> wrote:

> I am trying to construct a matrix with elements defined in
> mathematical expression. For example, a m*m matrix A with elements
> "a_{ij}"=partial Di/ partial Pj. Di (Pj) is the i-th ( j-th ) element
> of variable D(P).
>
> I just know -matrix define and -mkmat, however I didn't find out that
> these two commands could help me in this problem. Do I understand it
> well?
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