matplotlib & pandas

Python/matplotlab/gallery/userdemo/annotate_simple_coord03.md

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+# 简单Coord03注释示例
+
+![简单Coord03注释示例](https://matplotlib.org/_images/sphx_glr_annotate_simple_coord03_001.png)
+
+```python
+import matplotlib.pyplot as plt
+from matplotlib.text import OffsetFrom
+
+
+fig, ax = plt.subplots(figsize=(3, 2))
+an1 = ax.annotate("Test 1", xy=(0.5, 0.5), xycoords="data",
+                  va="center", ha="center",
+                  bbox=dict(boxstyle="round", fc="w"))
+
+offset_from = OffsetFrom(an1, (0.5, 0))
+an2 = ax.annotate("Test 2", xy=(0.1, 0.1), xycoords="data",
+                  xytext=(0, -10), textcoords=offset_from,
+                  # xytext is offset points from "xy=(0.5, 0), xycoords=an1"
+                  va="top", ha="center",
+                  bbox=dict(boxstyle="round", fc="w"),
+                  arrowprops=dict(arrowstyle="->"))
+plt.show()
+```
+
+## 下载这个示例
+            
+- [下载python源码: annotate_simple_coord03.py](https://matplotlib.org/_downloads/annotate_simple_coord03.py)
+- [下载Jupyter notebook: annotate_simple_coord03.ipynb](https://matplotlib.org/_downloads/annotate_simple_coord03.ipynb)