st: Re: replacing a scalar from mat

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

If you know that you are only extract one row and column, why not 
mat B = e(b)
mat B1 = B["y1","eq1:x1"]
scalar s=B1[1,1]

Michael Blasnik
michael.blasnik@verizon.net

----- Original Message ----- 
From: "R.E. De Hoyos" <redeho@hotmail.com>
To: <statalist@hsphsun2.harvard.edu>
Sent: Tuesday, July 12, 2005 12:48 PM
Subject: st: replacing a scalar from mat



> I am trying to get a scalar from a matrix (vector). Within a multiple 
> equations framework (-mlogit-) I want to get one of the parameters 
> estimated. After running -mlogit- I tried the following:
>
> mat B = e(b)
> scalar s = B["y1","eq1:x1"]
>
> The following error appears:
>
> matrix operators that return matrices not allowed in this context
> r(509);
>
> However if I try one of the following, there is no error reported:
>
> mat A = B["y1","eq1:x1"]
> scalar s = B[1,1]
>
> Using the rows and columns names of the matrix is important since these 
> scalars will be replaced into a second vector of estimated parameters.
>
> Thanks,
>
> Rafa
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