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