matplotlib & pandas

Python/matplotlab/gallery/text_labels_and_annotations/dashpointlabel.md

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+# Dashpoint标签
+
+![Dashpoint标签示例](https://matplotlib.org/_images/sphx_glr_dashpointlabel_001.png)
+
+```python
+import matplotlib.pyplot as plt
+
+DATA = ((1, 3),
+        (2, 4),
+        (3, 1),
+        (4, 2))
+# dash_style =
+#     direction, length, (text)rotation, dashrotation, push
+# (The parameters are varied to show their effects, not for visual appeal).
+dash_style = (
+    (0, 20, -15, 30, 10),
+    (1, 30, 0, 15, 10),
+    (0, 40, 15, 15, 10),
+    (1, 20, 30, 60, 10))
+
+fig, ax = plt.subplots()
+
+(x, y) = zip(*DATA)
+ax.plot(x, y, marker='o')
+for i in range(len(DATA)):
+    (x, y) = DATA[i]
+    (dd, dl, r, dr, dp) = dash_style[i]
+    t = ax.text(x, y, str((x, y)), withdash=True,
+                dashdirection=dd,
+                dashlength=dl,
+                rotation=r,
+                dashrotation=dr,
+                dashpush=dp,
+                )
+
+ax.set_xlim((0, 5))
+ax.set_ylim((0, 5))
+
+plt.show()
+```
+
+## 下载这个示例
+            
+- [下载python源码: dashpointlabel.py](https://matplotlib.org/_downloads/dashpointlabel.py)
+- [下载Jupyter notebook: dashpointlabel.ipynb](https://matplotlib.org/_downloads/dashpointlabel.ipynb)