Sure its all a matter of definition. But afaik tournament selection is
one of the most popular
steady state selection, because not all individuals are evaluated. there
is no replacement
of a whole generation (if you assume, the not evaluated individuals do
not use reproduction).
Sean Luke wrote:
> Generations are independent of the selection procedure. In
> generational selection, individuals are evaluated, and then through a
> process of selection and breeding, a new population is formed. Once
> the new population is in place, it replaces the old one and the cycle
> repeats. That's one generation.
> The only exception to this is in steady state evolution, where ECJ
> used to abuse the "generation" marker to mean something else -- but
> we've since changed that and there is a formal definition in steady
> state evolution as to what everything is.
> On Oct 30, 2006, at 8:41 AM, Serethos wrote:
>> I am wondering how a Generation is defined in ECJ if Tournament
>> is used. Is there a generation change, after _one_ tournament has
>> been executed
>> or after enough individuals have been produced so that
>> numWinners == numIndividualsOfPopulation?