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61 lines
1.6 KiB
Markdown
61 lines
1.6 KiB
Markdown
# 光栅化演示
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```python
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import numpy as np
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import matplotlib.pyplot as plt
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d = np.arange(100).reshape(10, 10)
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x, y = np.meshgrid(np.arange(11), np.arange(11))
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theta = 0.25*np.pi
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xx = x*np.cos(theta) - y*np.sin(theta)
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yy = x*np.sin(theta) + y*np.cos(theta)
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fig, ((ax1, ax2), (ax3, ax4)) = plt.subplots(2, 2)
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ax1.set_aspect(1)
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ax1.pcolormesh(xx, yy, d)
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ax1.set_title("No Rasterization")
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ax2.set_aspect(1)
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ax2.set_title("Rasterization")
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m = ax2.pcolormesh(xx, yy, d)
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m.set_rasterized(True)
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ax3.set_aspect(1)
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ax3.pcolormesh(xx, yy, d)
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ax3.text(0.5, 0.5, "Text", alpha=0.2,
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va="center", ha="center", size=50, transform=ax3.transAxes)
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ax3.set_title("No Rasterization")
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ax4.set_aspect(1)
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m = ax4.pcolormesh(xx, yy, d)
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m.set_zorder(-20)
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ax4.text(0.5, 0.5, "Text", alpha=0.2,
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zorder=-15,
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va="center", ha="center", size=50, transform=ax4.transAxes)
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ax4.set_rasterization_zorder(-10)
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ax4.set_title("Rasterization z$<-10$")
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# ax2.title.set_rasterized(True) # should display a warning
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plt.savefig("test_rasterization.pdf", dpi=150)
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plt.savefig("test_rasterization.eps", dpi=150)
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if not plt.rcParams["text.usetex"]:
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plt.savefig("test_rasterization.svg", dpi=150)
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# svg backend currently ignores the dpi
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```
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## 下载这个示例
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- [下载python源码: rasterization_demo.py](https://matplotlib.org/_downloads/rasterization_demo.py)
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- [下载Jupyter notebook: rasterization_demo.ipynb](https://matplotlib.org/_downloads/rasterization_demo.ipynb) |