椭圆演示

绘制多个椭圆.这里绘制了单独的椭圆.将其与 Ellipse collection example 进行比较.

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()

旋转的椭圆

绘制具有不同角度的多个椭圆.

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()

参考

以下函数,方法,类和模块的用法在本例中显示:

• 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