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34 lines
809 B
Markdown
34 lines
809 B
Markdown
# 填充螺旋
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```python
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import matplotlib.pyplot as plt
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import numpy as np
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theta = np.arange(0, 8*np.pi, 0.1)
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a = 1
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b = .2
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for dt in np.arange(0, 2*np.pi, np.pi/2.0):
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x = a*np.cos(theta + dt)*np.exp(b*theta)
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y = a*np.sin(theta + dt)*np.exp(b*theta)
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dt = dt + np.pi/4.0
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x2 = a*np.cos(theta + dt)*np.exp(b*theta)
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y2 = a*np.sin(theta + dt)*np.exp(b*theta)
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xf = np.concatenate((x, x2[::-1]))
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yf = np.concatenate((y, y2[::-1]))
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p1 = plt.fill(xf, yf)
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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: fill_spiral.py](https://matplotlib.org/_downloads/fill_spiral.py)
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- [下载Jupyter notebook: fill_spiral.ipynb](https://matplotlib.org/_downloads/fill_spiral.ipynb) |