matplotlib & pandas

Python/matplotlab/gallery/widgets/cursor.md

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+# 光标
+
+![光标示例](https://matplotlib.org/_images/sphx_glr_cursor_001.png)
+
+```python
+from matplotlib.widgets import Cursor
+import numpy as np
+import matplotlib.pyplot as plt
+
+
+# Fixing random state for reproducibility
+np.random.seed(19680801)
+
+fig = plt.figure(figsize=(8, 6))
+ax = fig.add_subplot(111, facecolor='#FFFFCC')
+
+x, y = 4*(np.random.rand(2, 100) - .5)
+ax.plot(x, y, 'o')
+ax.set_xlim(-2, 2)
+ax.set_ylim(-2, 2)
+
+# Set useblit=True on most backends for enhanced performance.
+cursor = Cursor(ax, useblit=True, color='red', linewidth=2)
+
+plt.show()
+```
+
+## 下载这个示例
+            
+- [下载python源码: cursor.py](https://matplotlib.org/_downloads/cursor.py)
+- [下载Jupyter notebook: cursor.ipynb](https://matplotlib.org/_downloads/cursor.ipynb)