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# Re: st: RE: Basic Matrix Definition Question

 From "Thomas Jacobs" To statalist@hsphsun2.harvard.edu Subject Re: st: RE: Basic Matrix Definition Question Date Mon, 15 Oct 2007 13:23:04 -0500

```Thanks Daniel, that was the problem.  It works with local macros.

Tom

On 10/15/07, Daniel Waxman <dan@amplecat.com> wrote:
> I'm no matrix expert, but there is a logical problem here.
>
> You define x and y as variables and they can take on a different value for
> each observation (although you are giving them the same value for each
> observation in your example).
>
> so it is unclear which values of x and y your matrix command would use.
>
> . display x
>
> Gives you the value of x in the first observation (although it is unclear to
> me why Stata lets you do this).
>
> Perhaps what you need are local macros?
>
> . local x 1
> . local y 1
> . matrix byvar = (`x',`y')
>
>
> Daniel
>
>
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> 6:48 AM
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>
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>

--
Thomas Jacobs
*
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```

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