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Re: st: How to get parts of XB matrix


From   Austin Nichols <austinnichols@gmail.com>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: How to get parts of XB matrix
Date   Fri, 3 Jun 2011 17:56:41 -0400

Zhi Su <su.zh@husky.neu.edu> :
Something like
g xb=0
foreach v of loc X {
replace xb=xb+'v'*_b['v']
}

On Friday, June 3, 2011, Zhi Su <su.zh@husky.neu.edu> wrote:
> Dear statalist,
>
>   I run a regression Y=XB+u, with 30 independent variables. I want to
> get predicted XB of 15 independent variables among 30 independent
> variables.
>   Here are my questions
>   1.The coefficient of an independent variable x is stored in _b[x].
> Is _b[x] a vector or scalar?
>   2. Generally, I use "local" to assign X I want in to a local macro
> name. And I can easily change X in the local macro name. How can I
> utilize this local macro name when I create XB matrix with independent
> variables I want?
>
>   Thank you!
>
> --
> Zhi Su
> 348 Holmes Hall
> Northeastern University
> 360 Huntington Avenue
> Boston, MA 02115
> Office:1-617-373-2316
> email:su.zh@husky.neu.edu
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