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40 lines
965 B
Markdown
40 lines
965 B
Markdown
# Frontpage 轮廓示例
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此示例再现Frontpage 轮廓示例。
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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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from matplotlib import cm
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extent = (-3, 3, -3, 3)
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delta = 0.5
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x = np.arange(-3.0, 4.001, delta)
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y = np.arange(-4.0, 3.001, delta)
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X, Y = np.meshgrid(x, y)
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Z1 = np.exp(-X**2 - Y**2)
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Z2 = np.exp(-(X - 1)**2 - (Y - 1)**2)
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Z = Z1 - Z2
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norm = cm.colors.Normalize(vmax=abs(Z).max(), vmin=-abs(Z).max())
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fig, ax = plt.subplots()
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cset1 = ax.contourf(
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X, Y, Z, 40,
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norm=norm)
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ax.set_xlim(-2, 2)
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ax.set_ylim(-2, 2)
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ax.set_xticks([])
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ax.set_yticks([])
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fig.savefig("contour_frontpage.png", dpi=25) # results in 160x120 px image
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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: contour.py](https://matplotlib.org/_downloads/contour.py)
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- [下载Jupyter notebook: contour.ipynb](https://matplotlib.org/_downloads/contour.ipynb)
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