Richard,
This has to be wrapped up in a program, right?
Something like this:
program foo, eclass
tempname bmat
matrix `bmat' = e(b)
matrix `bmat'[1,1] = 122
ereturn repost b = `bmat'
end
. clear
. sysuse auto
(1978 Automobile Data)
. qui reg price mpg weight
. matrix list e(b)
e(b)[1,3]
mpg weight _cons
y1 -49.512221 1.7465592 1946.0687
. foo
. matrix list e(b)
e(b)[1,3]
mpg weight _cons
y1 122 1.7465592 1946.0687
Scott
> -----Original Message-----
> From: [email protected] [mailto:owner-
> [email protected]] On Behalf Of Richard Williams
> Sent: Monday, April 11, 2005 6:19 AM
> To: [email protected]
> Subject: Re: st: changing beta coefficients
>
> At 10:23 AM 4/11/2005 +0200, Peter Haan wrote:
> >dear stata list,
> >
> >I have the following question:
> >
> >Is it possibe to change the estimated vector of beta coefficients by
> hand.
> >I want to predict with a slightly different beta vector than the
> >estimated,
> >The idea is to replace the estimated vector e(b) by an artificial e(b*)
> >and then to use the command pred,
> >however, as far as I know I cannot change e(b).
>
> Yes you can. Check out -ereturn repost-. You might, for example, do
> something like
>
> tempname bmat
> matrix `bmat' = e(b)
> ...Make changes to `bmat'...
> ereturn repost b = `bmat'
>
>
>
> -------------------------------------------
> Richard Williams, Notre Dame Dept of Sociology
> OFFICE: (574)631-6668, (574)631-6463
> FAX: (574)288-4373
> HOME: (574)289-5227
> EMAIL: [email protected]
> WWW (personal): http://www.nd.edu/~rwilliam
> WWW (department): http://www.nd.edu/~soc
>
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