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Re: st: Tip: Exponentiated macros should be placed in parentheses.


From   Maarten buis <maartenbuis@yahoo.co.uk>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Tip: Exponentiated macros should be placed in parentheses.
Date   Mon, 11 Feb 2008 21:03:31 +0000 (GMT)

--- D H <dave1063@gmail.com> wrote:
> Stata contains a trap for novice programmers and users of certain
> commands such as nl.  If a local or global macro contains a value
> that is less than zero, care should be taken when using the
> exponentiation operator.
> 
> Example:
> . global A = -5
> 
> . display $A^2
> -25

This is documented here:
http://www.stata.com/support/faqs/lang/macpow.html

-- Maarten

-----------------------------------------
Maarten L. Buis
Department of Social Research Methodology
Vrije Universiteit Amsterdam
Boelelaan 1081
1081 HV Amsterdam
The Netherlands

visiting address:
Buitenveldertselaan 3 (Metropolitan), room Z434

+31 20 5986715

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


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