Scatter Plot

Scatter Plot#

The traditional scatter plot is mostly used for lower dimensional objective spaces.

Scatter 2D#

[1]:

from pymoo.visualization.scatter import Scatter
from pymoo.problems import get_problem

F = get_problem("zdt3").pareto_front()
Scatter().add(F).show()

[1]:

<pymoo.visualization.scatter.Scatter at 0x7df5e86a1490>
../_images/visualization_scatter_4_1.png
The plot can be further customized by supplying a title, labels, and by using the plotting directives from matplotlib.
[2]:

F = get_problem("zdt3").pareto_front(use_cache=False, flatten=False)
plot = Scatter()
plot.add(F, s=30, facecolors='none', edgecolors='r')
plot.add(F, plot_type="line", color="black", linewidth=2)
plot.show()

[2]:

<pymoo.visualization.scatter.Scatter at 0x7df62048bdd0>
../_images/visualization_scatter_6_1.png

Scatter 3D#

[3]:

from pymoo.util.ref_dirs import get_reference_directions

ref_dirs = get_reference_directions("uniform", 3, n_partitions=12)

F = get_problem("dtlz1").pareto_front(ref_dirs)

plot = Scatter()
plot.add(F)
plot.show()

[3]:

<pymoo.visualization.scatter.Scatter at 0x7df606c06e50>
../_images/visualization_scatter_8_1.png

Scatter ND / Pairwise Scatter Plots#

[4]:

import numpy as np
F = np.random.random((30, 4))

plot = Scatter(tight_layout=True)
plot.add(F, s=10)
plot.add(F[10], s=30, color="red")
plot.show()

[4]:

<pymoo.visualization.scatter.Scatter at 0x7df5dc4ff0d0>
../_images/visualization_scatter_10_1.png

API#

class pymoo.visualization.scatter.Scatter(plot_3d: bool = True, angle: tuple[int, int] = (45, 45), **kwargs)[source]

Scatter plot visualization.

Parameters:

  • plot_3d – Whether to plot 3D scatter plots.

  • angle – The viewing angle for 3D plots.

  • axis_style – {axis_style}

  • labels – {labels}

  • figsize – {figsize}

  • title – {title}

  • legend – {legend}

  • tight_layout – {tight_layout}

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