Change the program to:
program foo2, eclass
tempname bmat
matrix `bmat' = e(b)
matrix b = e(b)
ereturn post b
matrix `bmat'[1,1] = 122
ereturn repost b = `bmat'
end
This seems to work for both -regress- and -logit-
Scott
> -----Original Message-----
> From: [email protected] [mailto:owner-
> [email protected]] On Behalf Of Kirsten P Smith
> Sent: Thursday, July 21, 2005 4:56 PM
> To: [email protected]
> Subject: st: Changing beta coefficients - w/ logistic regression
>
> Back in April, someone posted a question about how to change beta
> coefficients.
>
> The answer given (more specifically, the sample code) works perfectly
> for linear regression output. But I can't seem to get it to work when
> the estimated model is a logistic regression.
>
> Any ideas how to make the code work for LOGISTIC regression?
>
> I've exactly replicted the code that works for regress, changing only
> the dependent variable (from price to foreign) and the estimation
> command, to logit.
>
> Output from stata is the following:
>
> . program foo, eclass
> 1. tempname bmat
> 2. matrix `bmat' = e(b)
> 3. matrix `bmat'[1,1] = 122
> 4. ereturn repost b = `bmat'
> 5. end
>
> .
> .
> . clear
>
> .
> . sysuse auto
> (1978 Automobile Data)
>
> . quietly logit foreign mpg weight
>
> . matrix list e(b)
>
> e(b)[1,3]
> mpg weight _cons
> y1 -.1685869 -.0039067 13.708367
>
> .
> . foo
> last estimates not found
>
> *****
>
> For comparison, the following is the (successful) output for regress:
>
> . program foo, eclass
> 1. tempname bmat
> 2. matrix `bmat' = e(b)
> 3. matrix `bmat'[1,1] = 122
> 4. ereturn repost b = `bmat'
> 5. end
>
> .
> .
> . clear
>
> .
> . sysuse auto
> (1978 Automobile Data)
>
> . quietly regress 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
>
>
> Thanks in advance,
> Kirsten
> *
> * For searches and help try:
> * http://www.stata.com/support/faqs/res/findit.html
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
