Ellipse Demo

Draw many ellipses. Here individual ellipses are drawn. Compare this to the :doc:Ellipse collection example </gallery/shapes_and_collections/ellipse_collection>.

import matplotlib.pyplot as plt
import numpy as np

from matplotlib.patches import Ellipse

# Fixing random state for reproducibility
np.random.seed(19680801)

NUM = 250

ells = [Ellipse(xy=np.random.rand(2) * 10,
                width=np.random.rand(), height=np.random.rand(),
                angle=np.random.rand() * 360)
        for i in range(NUM)]

fig, ax = plt.subplots()
ax.set(xlim=(0, 10), ylim=(0, 10), aspect="equal")

for e in ells:
    ax.add_artist(e)
    e.set_clip_box(ax.bbox)
    e.set_alpha(np.random.rand())
    e.set_facecolor(np.random.rand(3))

plt.show()

Ellipse Rotated

Draw many ellipses with different angles.

angle_step = 45  # degrees
angles = np.arange(0, 180, angle_step)

fig, ax = plt.subplots()
ax.set(xlim=(-2.2, 2.2), ylim=(-2.2, 2.2), aspect="equal")

for angle in angles:
    ellipse = Ellipse((0, 0), 4, 2, angle=angle, alpha=0.1)
    ax.add_artist(ellipse)

plt.show()

… admonition:: References

The use of the following functions, methods, classes and modules is shown in this example:

• matplotlib.patches

• matplotlib.patches.Ellipse

• matplotlib.axes.Axes.add_artist

• matplotlib.artist.Artist.set_clip_box

• matplotlib.artist.Artist.set_alpha

• matplotlib.patches.Patch.set_facecolor