matplotlib 中 LaTeX 轴标签的粗体字重
问题描述
在 matplotlib 中，您可以将轴标签的文本设置为粗体
In matplotlib you can make the text of an axis label bold by
plt.xlabel('foo',fontweight='bold')
你也可以在正确的后端使用 LaTeX
You can also use LaTeX with the right backend
plt.xlabel(r'$phi$')
然而，当你将它们组合在一起时，数学文本不再是粗体了
When you combine them however, the math text is not bold anymore
plt.xlabel(r'$phi$',fontweight='bold')
以下 LaTeX 命令似乎也没有任何效果
Nor do the following LaTeX commands seem to have any effect
plt.xlabel(r'$f phi$')
plt.xlabel(r'$mathbf{phi}$')
如何在我的轴标签中添加粗体 $phi$?
解决方案
很遗憾，您不能使用粗体字体来加粗符号，请参阅 this question on tex.stackexchange.
Unfortunately you can't bold symbols using the bold font, see this question on tex.stackexchange.
正如答案所暗示的，您可以使用 oldsymbol 来加粗 phi:
As the answer suggests, you could use oldsymbol to bold phi:
r'$oldsymbol{phi}$'
您需要将 amsmath 加载到 TeX 序言中:
You'll need to load amsmath into the TeX preamble:
matplotlib.rc('text', usetex=True)
matplotlib.rcParams['text.latex.preamble']=[r"usepackage{amsmath}"]
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