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RE: st: Mata in an rclass program to bootstrap


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   stata list <statalist@hsphsun2.harvard.edu>
Subject   RE: st: Mata in an rclass program to bootstrap
Date   Sun, 19 Jul 2009 13:52:45 +0000 (GMT)

--- Nelson, Carl wrote:
<snip>
> Is there a proper way to embed mata in a program to bootstrap
> that will not create this error?

Here is a silly example. More general advise can be found 
here: -help m1_ado-

*-------------- begin example ------------
mata: mata clear
sysuse auto, clear

mata:
void foo(string scalar b) {
	bb =st_matrix(b)
	bb = 2:*bb
	st_matrix("b", bb)
}
end

program drop _all
program define silly, rclass
	reg mpg foreign
	matrix b = e(b)
	mata: foo("b")
	return scalar b1 = el(b,1,1)
	return scalar b2 = el(b,1,2)
end
bootstrap b1=r(b1) b2=r(b2), reps(100): silly
*-------------- end example -----------------

Hope this helps,
Maarten

-----------------------------------------
Maarten L. Buis
Institut fuer Soziologie
Universitaet Tuebingen
Wilhelmstrasse 36
72074 Tuebingen
Germany

http://home.fsw.vu.nl/m.buis/
-----------------------------------------


      

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