matplotlib & pandas

Python/matplotlab/gallery/misc/bbox_intersect.md

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+# 改变与盒子相交的线条的颜色
+
+与矩形相交的线条用红色着色，而其他线条用蓝色线条留下。此示例展示了intersect_bbox函数。
+
+![改变与盒子相交的线条的颜色示例](https://matplotlib.org/_images/sphx_glr_bbox_intersect_001.png)
+
+```python
+import numpy as np
+import matplotlib.pyplot as plt
+from matplotlib.transforms import Bbox
+from matplotlib.path import Path
+
+# Fixing random state for reproducibility
+np.random.seed(19680801)
+
+
+left, bottom, width, height = (-1, -1, 2, 2)
+rect = plt.Rectangle((left, bottom), width, height, facecolor="#aaaaaa")
+
+fig, ax = plt.subplots()
+ax.add_patch(rect)
+
+bbox = Bbox.from_bounds(left, bottom, width, height)
+
+for i in range(12):
+    vertices = (np.random.random((2, 2)) - 0.5) * 6.0
+    path = Path(vertices)
+    if path.intersects_bbox(bbox):
+        color = 'r'
+    else:
+        color = 'b'
+    ax.plot(vertices[:, 0], vertices[:, 1], color=color)
+
+plt.show()
+```
+
+## 下载这个示例
+            
+- [下载python源码: bbox_intersect.py](https://matplotlib.org/_downloads/bbox_intersect.py)
+- [下载Jupyter notebook: bbox_intersect.ipynb](https://matplotlib.org/_downloads/bbox_intersect.ipynb)