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RE: st: Programming Help


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   RE: st: Programming Help
Date   Mon, 10 Mar 2008 09:40:48 -0000

For the underlying programming principles, go straight to a text on 
combinatorial algorithms. (Search your univ. library catalogue.) 
And then code them in Mata. 

The programs I am aware of, -allpossible- and -selectvars- on SSC, are
not good examples of combinatorial programming. They just do what the
author
intended with examples of modest size. 

Nick
n.j.cox@durham.ac.uk 

David Airey


Why not download one of these and view the program code? That's one  
nice thing about Stata, you can view code for many of the commands.

On Mar 9, 2008, at 8:13 PM, Raphael Fraser wrote:

> I would like to program all the possible subsets for a regression, say
> regress y x1 x2 x3. How can this be done? I know programs like  
> allpossible
> already exist but I am more interested in the "how to" or the
> underlying programming principle.

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