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38 lines
1.1 KiB
Markdown
38 lines
1.1 KiB
Markdown
# 单位处理
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下面的示例显示了对掩码数组的单位转换的支持。
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此示例需要[basic_units.py](https://matplotlib.org/_downloads/3a73b4cd6e12aa53ff277b1b80d631c1/basic_units.py)
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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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from basic_units import secs, hertz, minutes
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# create masked array
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data = (1, 2, 3, 4, 5, 6, 7, 8)
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mask = (1, 0, 1, 0, 0, 0, 1, 0)
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xsecs = secs * np.ma.MaskedArray(data, mask, float)
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fig, (ax1, ax2, ax3) = plt.subplots(nrows=3, sharex=True)
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ax1.scatter(xsecs, xsecs)
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ax1.yaxis.set_units(secs)
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ax1.axis([0, 10, 0, 10])
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ax2.scatter(xsecs, xsecs, yunits=hertz)
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ax2.axis([0, 10, 0, 1])
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ax3.scatter(xsecs, xsecs, yunits=hertz)
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ax3.yaxis.set_units(minutes)
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ax3.axis([0, 10, 0, 1])
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fig.tight_layout()
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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: units_scatter.py](https://matplotlib.org/_downloads/units_scatter.py)
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- [下载Jupyter notebook: units_scatter.ipynb](https://matplotlib.org/_downloads/units_scatter.ipynb) |