Matplotlib编程实现
import matplotlib.pyplot as plt
import numpy as np
from matplotlib.patches import Circle
fig, ax = plt.subplots(2, 2)
circle = Circle((2, 2), radius=2, facecolor="white", edgecolor="#000000")
ax[0, 0].add_patch(circle)
ax[0, 0].set_xlim(-1, 5)
ax[0, 0].set_ylim(-1, 5)
rectangle = ax[0, 1].patch
rectangle.set_facecolor("#CCFF00")
circle = Circle((2, 2), radius=2, facecolor="white", edgecolor="#000000")
ax[0, 1].add_patch(circle)
ax[0, 1].set_xlim(-1, 5)
ax[0, 1].set_ylim(-1, 5)
ax[0, 1].set_aspect("equal", "box")
rectangle = ax[1, 0].patch
rectangle.set_facecolor("#00CCFF")
circle = Circle((2, 2), radius=2, facecolor="white", edgecolor="#000000")
ax[1, 0].add_patch(circle)
ax[1, 0].axis("equal")
rectangle = ax[1, 1].patch
rectangle.set_facecolor("#FF3333")
circle = Circle((2, 2), radius=2, facecolor="white", edgecolor="#000000")
ax[1, 1].add_patch(circle)
ax[1, 1].axis([-1, 5, -1, 5])
ax[1, 1].set_yticks(np.arange(-1, 6, 1))
ax[1, 1].axis("equal")
plt.subplots_adjust(left=0.1)
plt.show()
