How to always evaluate?

[Matthew Wall]

the 'evaluate' member of the population object is invoked by the genetic
algorithm object, typically in the 'step' method.  this is typically done
after all of the mating and mutating.

so the simplest thing to do is derive your own genetic algorithm and write
a new step method that does pop->evaluate(gaTrue) rather than
pop->evaluate()


>Ok,
>
>As I was browsing through the documentation of GAlib last night, I saw
>that one can change the population evaluator, and if I want to "always
>evaluate" I could use the following evaluator :
>
>1 void
>2 PopulationAlwaysEvaluate(GAPopulation & p){
>3   for(int i=0; i<p.size(); i++)
>4     p.Individual(i).evaluate(gaTrue);
>5 }
>
>Especially the gaTrue at line 4 makes sure every genome is evaluated
>every generation.
>
>Fair enough to me, but now I have this new question... How do I tell
>Galib, or the running genetic algorithm, that it's population has to be
>evaluated with this population evaluator?
>
>thanks in advance,
>
>Anthony Liekens
>liekens at alife.santafe.edu


Matthew Wall
mbwall at REMOVE_THE_SPAM.mit.edu
http://mit.edu/mbwall