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Re: [Bug-glpk] Missing documentation {1..100:Uniform01()<.1}


From: Andrew Makhorin
Subject: Re: [Bug-glpk] Missing documentation {1..100:Uniform01()<.1}
Date: Wed, 05 Aug 2015 08:36:00 +0300

On Tue, 2015-08-04 at 23:34 +0200, Heinrich Schuchardt wrote:
> Hello Andrew,
> 
> the following syntax is useful to produce a random set.
> 
> set J := {1..100:Uniform01()<.1};
> display J;
> end;
> 
> Unfortunately gmpl.pdf does not describe when random number are
> evaluated in indexing expression.

Clause 3.1.5 "Function references", p. 14, explains how pseudo-random
generator functions are evaluated.

> 
> Please, add a sentence like
> "If the predicate of the indexing expression depends on a random
> function, it will be evaluated for every index combination individually."
> 
> Best regards
> 
> Heinrich Schuchardt
> 
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