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notes_estom/Python/matplotlab/gallery/units/bar_demo2.md
2020-09-26 22:03:11 +08:00

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单位条形图

使用各种厘米和英寸转换的图像。此示例显示默认单位内省如何工作ax1如何使用各种关键字来设置x和y单位以覆盖默认值ax2ax3ax4以及如何使用标量设置xlimitsax3当前单位 假设)或单位(用于将数字转换为当前单位的转换)。

此示例需要 basic_units.py

单位条形图示例

import numpy as np
from basic_units import cm, inch
import matplotlib.pyplot as plt

cms = cm * np.arange(0, 10, 2)
bottom = 0 * cm
width = 0.8 * cm

fig, axs = plt.subplots(2, 2)

axs[0, 0].bar(cms, cms, bottom=bottom)

axs[0, 1].bar(cms, cms, bottom=bottom, width=width, xunits=cm, yunits=inch)

axs[1, 0].bar(cms, cms, bottom=bottom, width=width, xunits=inch, yunits=cm)
axs[1, 0].set_xlim(2, 6)  # scalars are interpreted in current units

axs[1, 1].bar(cms, cms, bottom=bottom, width=width, xunits=inch, yunits=inch)
axs[1, 1].set_xlim(2 * cm, 6 * cm)  # cm are converted to inches

fig.tight_layout()
plt.show()

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