Matplotlib裁剪或修剪直线和多边形

import matplotlib.pyplot as plt

fig, ax = plt.subplots()

# 绘制直线
line, = ax.plot([0, 1], [0, 1], color='blue')

# 创建一个矩形路径对象作为裁剪区域
rect = plt.Rectangle((0.2, 0.2), 0.6, 0.6, transform=ax.transAxes)

# 将直线裁剪到矩形区域内
line.set_clip_path(rect)

plt.show()

import matplotlib.pyplot as plt
from matplotlib.path import Path
import matplotlib.patches as patches

fig, ax = plt.subplots()

# 绘制多边形
polygon = patches.Polygon([(0, 0), (0.5, 1), (1, 0)], closed=True, fill=None, edgecolor='blue')

# 创建一个自定义路径对象作为裁剪区域
path = Path([(0.2, 0.2), (0.5, 0.8), (0.8, 0.2)], closed=True)

# 将多边形裁剪到自定义路径区域内
polygon.set_clip_path(path)

ax.add_patch(polygon)
plt.xlim(0, 1)
plt.ylim(0, 1)

plt.show()