max_generation=MAX_GENERATION,
selection_fun=None,
mutation_fun=None,
mutation_rate=None,
crossover_fun=nsga_crossover,
trial_method='lhs',
trial_criterion='cm',
u=0.,
st=0.2)
#pop.config_sampling(methods=samplers, sizes=sample_sizes,
# sample_rates=sample_rates,
# candidates=sample_candidates)
pop.config_sampling(methods='default',
sizes='default',
rate='default',
candidates='default')
pop.run(params_ea=params_ea, params_surrogate=params_surrogate, theo=theo)
# ================================Visualization================================
fig, (ax, ax_metric) = plt.subplots(1, 2, figsize=(10, 4), dpi=100)
# Test surrogate results
final_arc = pop.true_front
x = []
y = []
for f in final_arc:
x.append(f.fitness[0])
y.append(f.fitness[1])
def run_sim(n, path, simtitle, REVOLUTION, PROBLEM, seed):
POP_SIZE = 100
MAX_GENERATION = 50
MAX_EPISODE = 100
MAX_EVAL = 1000
STOPPING_RULE = 'max_eval'
MUTATION_RATE = 0.1
MUTATION_U = 0.
MUTATION_ST = 0.2
REF = [-14.3, 0.05]
MINIMIZE = True
VERBOSE = True
X_SCALER = StandardScaler()
# Set global numpy random_state
np.random.seed(seed)
theo = np.genfromtxt('pareto_Kursawe.txt', dtype='f8')
# Instantiate a population
pop = GOMORS(size=POP_SIZE,
problem=PROBLEM,
max_generation=MAX_GENERATION,
max_episode=MAX_EPISODE,
reference=REF,
minimize=MINIMIZE,
stopping_rule=STOPPING_RULE,
max_eval=MAX_EVAL,
mutation_rate=MUTATION_RATE,
revolution=REVOLUTION,
embedded_ea=MOEAD,
verbose=VERBOSE,
no_improvement_step_tol=4)
pop.selection_fun = pop.compute_front
pop.mutation_fun = gaussian_mutator
pop.crossover_fun = random_crossover
# Parametrization
params_ea = {
'u': MUTATION_U,
'st': MUTATION_ST,
'trial_method': 'lhs',
'trial_criterion': 'cm'
}
kernel = CubicKernel
tail = LinearTail
params_surrogate = \
{'kernel': kernel,
'tail': tail,
'maxp': MAX_EVAL + POP_SIZE,
'eta': 1e-8,
}
# ===============================Initialization============================
pop.config_surrogate(typ='rbf',
params=params_surrogate,
n_process=1,
X_scaler=X_SCALER,
warm_start=True)
pop.config_gap_opt(at='least_crowded',
radius=0.1,
size=POP_SIZE,
max_generation=MAX_GENERATION,
selection_fun=None,
mutation_fun=None,
mutation_rate=None,
crossover_fun=random_crossover,
trial_method='lhs',
trial_criterion='cm',
u=0.,
st=0.2)
pop.config_sampling(methods='default',
sizes='default',
rate='default',
candidates='default')
pop.run(params_ea=params_ea, params_surrogate=params_surrogate, theo=theo)
# ============================= Save Results ================================ #
# path to save
directory = path + simtitle + '/' + str(n) + '/'
if not os.path.exists(directory):
os.makedirs(directory)
pop.render_features(pop.true_front).tofile(directory + 'xs.dat')
pop.render_targets(pop.true_front).tofile(directory + 'fs.dat')
np.array(pop.hypervol_diff).tofile(directory + 'hv_diff.dat')
np.array(pop.hypervol_cov).tofile(directory + 'hv_cov.dat')
np.array(pop.hypervol_index).tofile(directory + 'hv_ind.dat')
# ================================Visualization============================== #
# plot_res(pop=pop, ref=theo, directory=directory)
return pop