matplotlib & pandas

Python/matplotlab/gallery/userdemo/annotate_simple03.md

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+# 注释Simple03
+
+![注释Simple03示例](https://matplotlib.org/_images/sphx_glr_annotate_simple03_001.png)
+
+```python
+import matplotlib.pyplot as plt
+
+
+fig, ax = plt.subplots(figsize=(3, 3))
+
+ann = ax.annotate("Test",
+                  xy=(0.2, 0.2), xycoords='data',
+                  xytext=(0.8, 0.8), textcoords='data',
+                  size=20, va="center", ha="center",
+                  bbox=dict(boxstyle="round4", fc="w"),
+                  arrowprops=dict(arrowstyle="-|>",
+                                  connectionstyle="arc3,rad=-0.2",
+                                  fc="w"),
+                  )
+
+plt.show()
+```
+
+## 下载这个示例
+            
+- [下载python源码: annotate_simple03.py](https://matplotlib.org/_downloads/annotate_simple03.py)
+- [下载Jupyter notebook: annotate_simple03.ipynb](https://matplotlib.org/_downloads/annotate_simple03.ipynb)