experimenter_plot.py

import matplotlib.pyplot as plt

from platypus import (CMAES, DTLZ2, GDE3, IBEA, MOEAD, NSGAII, NSGAIII, OMOPSO,
                      SMPSO, SPEA2, EpsMOEA, ProcessPoolEvaluator, experiment,
                      normal_boundary_weights)

if __name__ == '__main__':
    # setup the experiment
    problem = DTLZ2(3)

    algorithms = [NSGAII,
                  (NSGAIII, {"divisions_outer": 12}),
                  (CMAES, {"epsilons": [0.05]}),
                  GDE3,
                  IBEA,
                  (MOEAD, {"weight_generator": normal_boundary_weights, "divisions_outer": 12}),
                  (OMOPSO, {"epsilons": [0.05]}),
                  SMPSO,
                  SPEA2,
                  (EpsMOEA, {"epsilons": [0.05]})]

    # run the experiment using Python 3's concurrent futures for parallel evaluation
    with ProcessPoolEvaluator() as evaluator:
        results = experiment(algorithms, problem, seeds=1, nfe=10000, evaluator=evaluator)

    # display the results
    fig = plt.figure()

    for i, algorithm in enumerate(results.keys()):
        result = results[algorithm]["DTLZ2"][0]

        ax = fig.add_subplot(2, 5, i+1, projection='3d')
        ax.scatter([s.objectives[0] for s in result],
                   [s.objectives[1] for s in result],
                   [s.objectives[2] for s in result])
        ax.set_title(algorithm)
        ax.set_xlim([0, 1.1])
        ax.set_ylim([0, 1.1])
        ax.set_zlim([0, 1.1])
        ax.view_init(elev=30.0, azim=15.0)
        ax.locator_params(nbins=4)

    plt.show()