def main() -> None:
class GGA2(GenerationalGeneticAlgorithm[FloatSolution, FloatSolution]):
def is_stopping_condition_reached(self):
# Re-define the stopping condition
reached = [False, True][self.get_current_computing_time() > 4]
if reached:
logger.info("Stopping condition reached!")
return reached
variables = 10
problem = Sphere(variables)
algorithm = GGA2(problem,
population_size=100,
max_evaluations=0,
mutation=Polynomial(1.0 / variables,
distribution_index=20),
crossover=SBX(1.0, distribution_index=20),
selection=BinaryTournamentSelection())
algorithm.run()
result = algorithm.get_result()
logger.info("Algorithm (stop for timeout): " + algorithm.get_name())
logger.info("Problem: " + problem.get_name())
logger.info("Solution: " + str(result.variables))
logger.info("Fitness: " + str(result.objectives[0]))
def main() -> None:
class GGA2(GenerationalGeneticAlgorithm[FloatSolution, FloatSolution]):
def is_stopping_condition_reached(self):
# Re-define the stopping condition
reached = [False, True][self.get_current_computing_time() > 4]
if reached:
print("Stopping condition reached!")
return reached
variables = 10
problem = Sphere(variables)
algorithm = GGA2(
problem=problem,
population_size=100,
max_evaluations=0,
mutation=Polynomial(1.0/variables, distribution_index=20),
crossover=SBX(1.0, distribution_index=20),
selection=BinaryTournamentSelection()
)
algorithm.run()
result = algorithm.get_result()
print("Algorithm (stop for timeout): " + algorithm.get_name())
print("Problem: " + problem.get_name())
print("Solution: " + str(result.variables))
print("Fitness: " + str(result.objectives[0]))
print("Computing time: " + str(algorithm.total_computing_time))
def main() -> None:
variables = 10
problem = Sphere(variables)
algorithm = NonElitistEvolutionStrategy[FloatSolution, FloatSolution]\
(problem, mu=10, lambdA=10, max_evaluations= 50000, mutation=Polynomial(1.0/variables))
algorithm.run()
result = algorithm.get_result()
print("Algorithm: " + algorithm.get_name())
print("Problem: " + problem.get_name())
print("Solution: " + str(result.variables))
print("Fitness: " + str(result.objectives[0]))
print("Computing time: " + str(algorithm.total_computing_time))
def test_should_create_solution_create_a_valid_float_solution(self):
problem = Sphere(3)
solution = problem.create_solution()
self.assertEqual(3, solution.number_of_variables)
self.assertEqual(3, len(solution.variables))
self.assertEqual(1, solution.number_of_objectives)
self.assertEqual(1, len(solution.objectives))
self.assertEqual(0, problem.number_of_constraints)
self.assertEqual([-5.12, -5.12, -5.12], problem.lower_bound)
self.assertEqual([5.12, 5.12, 5.12], problem.upper_bound)
self.assertTrue(solution.variables[0] >= -5.12)
self.assertTrue(solution.variables[0] <= 5.12)
def main() -> None:
variables = 10
problem = Sphere(variables)
algorithm = GenerationalGeneticAlgorithm[FloatSolution, FloatSolution](
problem,
population_size=100,
max_evaluations=25000,
mutation=Polynomial(1.0/variables, distribution_index=20),
crossover=SBX(1.0, distribution_index=20),
selection=BinaryTournamentSelection())
algorithm.run()
result = algorithm.get_result()
logger.info("Algorithm (continuous problem): " + algorithm.get_name())
logger.info("Problem: " + problem.get_name())
logger.info("Solution: " + str(result.variables))
logger.info("Fitness: " + str(result.objectives[0]))
def test_should_constructor_create_a_valid_problem_with_5_variables(self):
problem = Sphere(5)
self.assertEqual(5, problem.number_of_variables)
self.assertEqual(1, problem.number_of_objectives)
self.assertEqual(0, problem.number_of_constraints)
self.assertEqual([-5.12, -5.12, -5.12, -5.12, -5.12],
problem.lower_bound)
self.assertEqual([5.12, 5.12, 5.12, 5.12, 5.12], problem.upper_bound)
def test_should_constructor_create_a_valid_problem_with_default_settings(
self):
problem = Sphere()
self.assertEqual(10, problem.number_of_variables)
self.assertEqual(1, problem.number_of_objectives)
self.assertEqual(0, problem.number_of_constraints)
self.assertEqual([-5.12 for _ in range(10)], problem.lower_bound)
self.assertEqual([5.12 for _ in range(10)], problem.upper_bound)
def main() -> None:
variables = 10
problem = Sphere(variables)
algorithm = ElitistEvolutionStrategy[FloatSolution, FloatSolution](
problem=problem,
mu=10,
lambd_a=10,
max_evaluations=50000,
mutation=Polynomial(probability=1.0/variables)
)
algorithm.run()
result = algorithm.get_result()
print("Algorithm: " + algorithm.get_name())
print("Problem: " + problem.get_name())
print("Solution: " + str(result.variables))
print("Fitness: " + str(result.objectives[0]))
print("Computing time: " + str(algorithm.total_computing_time))
def main() -> None:
variables = 10
problem = Sphere(variables)
algorithm = ElitistEvolutionStrategy[FloatSolution, FloatSolution](
problem=problem,
mu=10,
lambd_a=10,
max_evaluations=50000,
mutation=Polynomial(probability=1.0 / variables))
algorithm.start()
print("Algorithm (running as a thread): " + algorithm.get_name())
print("Problem: " + problem.get_name())
algorithm.join()
result = algorithm.get_result()
print("Solution: " + str(result.variables))
print("Fitness: " + str(result.objectives[0]))
print("Computing time: " + str(algorithm.total_computing_time))
def main() -> None:
variables = 10
problem = Sphere(variables)
algorithm = GenerationalGeneticAlgorithm[FloatSolution, FloatSolution](
problem=problem,
population_size=100,
max_evaluations=25000,
mutation=Polynomial(probability=1.0/variables, distribution_index=20),
crossover=SBX(probability=1.0, distribution_index=20),
selection=BinaryTournamentSelection()
)
algorithm.run()
result = algorithm.get_result()
print("Algorithm: " + algorithm.get_name())
print("Problem: " + problem.get_name())
print("Solution: " + str(result.variables))
print("Fitness: " + str(result.objectives[0]))
print("Computing time: " + str(algorithm.total_computing_time))
def main() -> None:
variables = 10
problem = Sphere(variables)
algorithm = GenerationalGeneticAlgorithm[FloatSolution, FloatSolution](
problem=problem,
population_size=100,
max_evaluations=25000,
mutation=Polynomial(probability=1.0 / variables,
distribution_index=20),
crossover=SBX(probability=1.0, distribution_index=20),
selection=BinaryTournamentSelection())
algorithm.run()
result = algorithm.get_result()
print("Algorithm: " + algorithm.get_name())
print("Problem: " + problem.get_name())
print("Solution: " + str(result.variables))
print("Fitness: " + str(result.objectives[0]))
print("Computing time: " + str(algorithm.total_computing_time))
def main() -> None:
variables = 10
problem = Sphere(variables)
algorithm = GenerationalGeneticAlgorithm[FloatSolution, FloatSolution](
problem,
population_size=100,
max_evaluations=25000,
mutation=Polynomial(1.0 / variables, distribution_index=20),
crossover=SBX(1.0, distribution_index=20),
selection=BinaryTournament())
observer = BasicAlgorithmConsumer(2000)
algorithm.observable.register(observer=observer)
algorithm.start()
algorithm.join()
result = algorithm.get_result()
logger.info("Algorithm: " + algorithm.get_name())
logger.info("Problem: " + problem.get_name())
logger.info("Solution: " + str(result.variables))
logger.info("Fitness: " + str(result.objectives[0]))
def test_should_constructor_create_a_non_null_object(self):
problem = Sphere(3)
self.assertIsNotNone(problem)
def test_should_get_name_return_the_right_name(self):
problem = Sphere()
self.assertEqual("Sphere", problem.get_name())
from jmetal.algorithm.singleobjective.local_search import LocalSearch
from jmetal.operator import PolynomialMutation
from jmetal.problem.singleobjective.unconstrained import Sphere
from jmetal.util.observer import PrintObjectivesObserver
from jmetal.util.solutions_utils import print_function_values_to_file, print_variables_to_file
from jmetal.util.termination_criterion import StoppingByEvaluations
if __name__ == '__main__':
problem = Sphere(10)
max_evaluations = 1000000
algorithm = LocalSearch(
problem=problem,
mutation=PolynomialMutation(1.0 / problem.number_of_variables, 20.0),
termination_criterion=StoppingByEvaluations(max=max_evaluations)
)
objectives_observer = PrintObjectivesObserver(frequency=10000)
algorithm.observable.register(observer=objectives_observer)
algorithm.run()
result = algorithm.get_result()
# Save results to file
print_function_values_to_file(result, 'FUN.'+ algorithm.get_name() + "." + problem.get_name())
print_variables_to_file(result, 'VAR.' + algorithm.get_name() + "." + problem.get_name())
print('Algorithm: ' + algorithm.get_name())
print('Problem: ' + problem.get_name())
print('Solution: ' + str(result.variables))
from jmetal.algorithm.singleobjective.local_search import LocalSearch
from jmetal.operator import PolynomialMutation
from jmetal.problem.singleobjective.unconstrained import Sphere
from jmetal.util.solution import print_function_values_to_file, print_variables_to_file
from jmetal.util.termination_criterion import StoppingByEvaluations
if __name__ == '__main__':
problem = Sphere(10)
max_evaluations = 1000000
algorithm = LocalSearch(problem=problem,
mutation=PolynomialMutation(
1.0 / problem.number_of_variables, 20.0),
termination_criterion=StoppingByEvaluations(
max_evaluations=max_evaluations))
algorithm.run()
result = algorithm.get_result()
# Save results to file
print_function_values_to_file(
result, 'FUN.' + algorithm.get_name() + "." + problem.get_name())
print_variables_to_file(
result, 'VAR.' + algorithm.get_name() + "." + problem.get_name())
print('Algorithm: ' + algorithm.get_name())
print('Problem: ' + problem.get_name())
print('Solution: ' + str(result.variables))
print('Fitness: ' + str(result.objectives[0]))
print('Computing time: ' + str(algorithm.total_computing_time))