Specifies the minimum diversity the population must have in order to be considered viable. If the Diversity of the Population falls below this limit, the
Evolve method will abort evolution.
Note the
UseDiversityLimit property must be True to use the diversity limit.
Namespace: RSGeneticBase
Delphi
|
public
property DiversityLimit: TGAProbability read FDiversityLimit write SetDiversityLimit stored IsDiversityLimitStored;
|
Property Value
Type: TGAProbability
The following example uses Diversity, Generation and Fitness to automatically stop evolution:
Delphi
|
var
i: Integer;
begin
// evolve population for number of generations, until diversity is too
// low, or best individual meets fitness cutoff and
// return number of generations executed
result := Generation;
for i := 0 to Generations - 1 do
begin
Evolve;
if (UseFitnessCutoff and
(((FitnessMethod in [fmMaximize, fmWeightedMaximize]) and (FittestIndividual.Fitness >= FitnessCutoff)) or
((FitnessMethod in [fmMinimize, fmWeightedMinimize]) and (FittestIndividual.Fitness <= FitnessCutoff)))) or
(UseDiversityLimit and (Diversity < DiversityLimit)) or
(UseGenerationLimit and (Generation >= GenerationLimit)) then Break;
end;
result := Generation - result;
end;
|
|
