[galib] replacement of best individual

[matthew wall]

On 18 Aug 2008, at 20:02, Kupfer, Michael (ARC-AFA)[UC SANTA CRUZ]  
wrote:
> Dear all,
>
> Under certain conditions, I would like to replace the current best  
> individual with another one:
>
> Each time a new best individual is found I want to run a local  
> search heuristic to improve this current best.
> If this improvement routine was successful, I would like to replace  
> the current best with the result of the local search.
> How can I do the replacement? How can I replace pop.best() with the  
> gene-values found in the improvement routine?
>

hi michael,

one approach is to create your own genetic algorithm object, since it  
has access to and complete control over the population.  for example,  
this is a derivative of a simple ga that does repair

class MyGA : public GASimpleGA {
public:
   virtual void step();
}

void
MyGA::step() {
   // let the simple ga do its logic for a single step of evolution
   GASimpleGA::step();

   // this is the genome into which you stick the repairs
   MyGenome genome;
   genome.copy(pop->individual(x));

   // do your heuristic to improve the best here
   genome.setSomeValue();
   genome.modifySomeAttribute();

   // insert the genome into the population at the appropriate location
   pop->individual(x).copy(genome);
}