[galib] customization problem

[Christian Samuel Perone]

About the initializer, the prototype of the
initializer function is "void
(*GAGenome::Initializer)(GAGenome &)", so you 
can't pass a function with a float parameter. I
recommend use of globals, it's a bad pratice, but
is the only that I know in this case.

--- #SAWHNEY ADITI# <aditi at pmail.ntu.edu.sg> escreveu:

> Supposing these below are the protoptypes for my
> customized initializer and objectiev functions.
> 
> float objective(GAGenome &, float);
> 
> void RouteInitializer(GAGenome &, float );
> 
>  
> my question is how now do i pass the float parameter
> to teh fiunctions. normally to make gagenome use my
> customized function i would just issue:
> GARealGenome genome(numCustomer+numVeh, alleles,
> objective);
> 
> genome.initializer(RouteInitializer);
> 
> but how will i pass my float parameter? oor should i
> make my parameter a global variable?
> 
> I'm sorry for the amateurish quetsiosn but i am new
> to galib and c++.
> 
> Thanks,
> 
> Aditi
> 
> 
> ________________________________
> 
> From: galib-bounces at mit.edu on behalf of Christian
> S. Perone
> Sent: Tue 6/7/2005 3:30 AM
> To: galib at mit.edu
> Subject: Re: [galib] minimization problem
> 
> 
> 
> Hello,
> 
> *GALinearScaling*(float c =
> /gaDefLinearScalingMultiplier/)
>     The fitness scores are derived from the
> objective scores using the
>     linear scaling method described in Goldberg's
> book. You can specify
>     the scaling coefficient. *Negative objective
> scores are not allowed
>     with this method.* Objective scores are
> converted to fitness scores
>     using the relation
> 
> You can read in
> http://lancet.mit.edu/galib-2.4/API.html about the
> Linear Scaling that not
> allow negative scores. To minimize the objective
> function just call
> ga.minimize(), like Anthony said.
> This function is in GABaseGA.h:
>     (...)
>        int minimize() { return minimaxi(MINIMIZE); }
> 
> and the minimaxi() is in GABaseGA.c:
>     (...)
>        if(m==MINIMIZE)
>           pop->order(GAPopulation::LOW_IS_BEST);
> 
> I hope that this can help.
> 
> energenius energenius wrote:
> 
> > Hi,
> >
> > I'm using GALib.2.4.5 with VC6.0. I want to
> minimize my objective
> > function. Although my program works properly in
> maximization, when I
> > use ga.minimize(), it stucks and gives no
> response. How can i solve
> > this problem?
> >
> > May adding a minus sign in front of the objective
> function be a solution?
> >
> > Thanks in advance.
> >
> >
>
_________________________________________________________________
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> rahat edin!
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> >
> >
> 
> 
>        
>        
>                
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              ( O o )       
-----------oOOo-(_)-oOOo-------------------
Christian Samuel Perone - christian_perone at yahoo dot com dot br
MSN - christian.perone at hotmail dot com
"Porque um dia você irá olhar para o céu e poderá estar vendo a terra."





	
	
		
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