Python绘制椭圆demo图

绘制许多椭圆。这里绘制了单个椭圆。将其与椭圆集合示例进行比较。

import matplotlib.pyplot as plt
import numpy as np

from matplotlib.patches import Ellipse

#固定随机状态以实现可重复性

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()

已旋转的椭圆

绘制许多不同角度的椭圆。

import matplotlib.pyplot as plt
import numpy as np

from matplotlib.patches import Ellipse

np.random.seed(19680801)

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()

参考文献：https://matplotlib.org/stable/gallery/shapes_and_collections/ellipse_demo.html