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st: AW: Should be simple yet ... how to write a function?


From   "Martin Weiss" <martin.weiss1@gmx.de>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: AW: Should be simple yet ... how to write a function?
Date   Wed, 18 Feb 2009 11:09:57 +0100

<> 


See http://www.stata-journal.com/article.html?article=pr0007

When you -generate- a variable, you implicitly apply a "function" to all
observations. If you want to write your own function, -egen- is a good
starting point, and this is explored in the article cited above...



HTH
Martin

-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Fabrice
Gesendet: Mittwoch, 18. Februar 2009 11:04
An: statalist@hsphsun2.harvard.edu
Betreff: st: Should be simple yet ... how to write a function?

Im a pretty advanced Stata user, but have a simple question I cant figure
out: how does one write a *function*, i.e. a program that returns a value,
and that can be called like local y = fct(x), where x and y are numbers or
strings.

This seems it should be  available somewhere in the language, yet I?ve
searched in a lot of programming explanations about Stata and never found a
way to write that.  FYI, I program extensively in stata, know about r-type
vs. e-type program, and know how to store results to return to main program.

I just don?t know how to write the most simple function form.

Any idea?

Fabrice



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