matplotlib & pandas

Python/matplotlab/gallery/units/units_sample.md

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+# 英寸和厘米
+
+该示例说明了使用绘图函数的xunits和yunits参数将默认x和y单位（ax1）覆盖为英寸和厘米的功能。 请注意，应用转换以获取正确单位的数字。
+
+此示例需要[basic_units.py](https://matplotlib.org/_downloads/3a73b4cd6e12aa53ff277b1b80d631c1/basic_units.py)
+
+![英寸和厘米示例](https://matplotlib.org/_images/sphx_glr_units_sample_001.png)
+
+```python
+from basic_units import cm, inch
+import matplotlib.pyplot as plt
+import numpy as np
+
+cms = cm * np.arange(0, 10, 2)
+
+fig, axs = plt.subplots(2, 2)
+
+axs[0, 0].plot(cms, cms)
+
+axs[0, 1].plot(cms, cms, xunits=cm, yunits=inch)
+
+axs[1, 0].plot(cms, cms, xunits=inch, yunits=cm)
+axs[1, 0].set_xlim(3, 6)  # scalars are interpreted in current units
+
+axs[1, 1].plot(cms, cms, xunits=inch, yunits=inch)
+axs[1, 1].set_xlim(3*cm, 6*cm)  # cm are converted to inches
+
+plt.show()
+```
+
+## 下载这个示例
+            
+- [下载python源码: units_sample.py](https://matplotlib.org/_downloads/units_sample.py)
+- [下载Jupyter notebook: units_sample.ipynb](https://matplotlib.org/_downloads/units_sample.ipynb)