matplotlib & pandas

Python/matplotlab/gallery/mplot3d/lines3d.md

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+# 参数曲线
+
+此示例演示了如何在3D中绘制参数曲线。
+
+![参数曲线示例](https://matplotlib.org/_images/sphx_glr_lines3d_001.png)
+
+```python
+# This import registers the 3D projection, but is otherwise unused.
+from mpl_toolkits.mplot3d import Axes3D  # noqa: F401 unused import
+
+import numpy as np
+import matplotlib.pyplot as plt
+
+
+plt.rcParams['legend.fontsize'] = 10
+
+fig = plt.figure()
+ax = fig.gca(projection='3d')
+
+# Prepare arrays x, y, z
+theta = np.linspace(-4 * np.pi, 4 * np.pi, 100)
+z = np.linspace(-2, 2, 100)
+r = z**2 + 1
+x = r * np.sin(theta)
+y = r * np.cos(theta)
+
+ax.plot(x, y, z, label='parametric curve')
+ax.legend()
+
+plt.show()
+```
+
+## 下载这个示例
+            
+- [下载python源码: lines3d.py](https://matplotlib.org/_downloads/lines3d.py)
+- [下载Jupyter notebook: lines3d.ipynb](https://matplotlib.org/_downloads/lines3d.ipynb)