椭圆演示
绘制多个椭圆。此处绘制单个椭圆。将其与Ellipse集合示例进行比较。
import matplotlib.pyplot as plt
import numpy as np
from matplotlib.patches import Ellipse
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(subplot_kw={'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))
ax.set_xlim(0, 10)
ax.set_ylim(0, 10)
plt.show()
椭圆旋转
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
delta = 45.0 # degrees
angles = np.arange(0, 360 + delta, delta)
ells = [Ellipse((1, 1), 4, 2, a) for a in angles]
a = plt.subplot(111, aspect='equal')
for e in ells:
e.set_clip_box(a.bbox)
e.set_alpha(0.1)
a.add_artist(e)
plt.xlim(-2, 4)
plt.ylim(-1, 3)
plt.show()
参考
此示例中显示了以下函数，方法，类和模块的使用：
import matplotlib
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