Python matplotlib 中 LaTeX 轴标签的粗体字重
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Bold font weight for LaTeX axes label in matplotlib
提问by Hooked
In matplotlibyou can make the text of an axis label bold by
在matplotlib可以使轴标签通过大胆的文字
plt.xlabel('foo',fontweight='bold')
You can also use LaTeX with the right backend
您还可以在正确的后端使用 LaTeX
plt.xlabel(r'$\phi$')
When you combine them however, the math text is not bold anymore
但是，当您将它们组合在一起时，数学文本不再是粗体
plt.xlabel(r'$\phi$',fontweight='bold')
Nor do the following LaTeX commands seem to have any effect
以下 LaTeX 命令似乎也没有任何效果
plt.xlabel(r'$\bf \phi$')
plt.xlabel(r'$\mathbf{\phi}$')
How can I make a bold $\phi$in my axis label?
如何$\phi$在我的轴标签中加粗？
采纳答案by Andy Hayden
Unfortunately you can't bold symbols using the bold font, see this questionon tex.stackexchange.
不幸的是，您不能使用粗体对符号进行加粗，请参阅tex.stackexchange 上的这个问题。
As the answer suggests, you could use \boldsymbolto bold phi:
正如答案所暗示的那样，您可以使用\boldsymbol粗体 phi：
r'$\boldsymbol{\phi}$'
You'll need to load amsmathinto the TeX preamble:
您需要加载amsmath到 TeX 序言中：
matplotlib.rc('text', usetex=True)
matplotlib.rcParams['text.latex.preamble']=[r"\usepackage{amsmath}"]
回答by drs
If you intend to have consistently bolded fonts throughout the plot, the best way may be to enable latex and add \boldmathto your preamble:
如果您打算在整个情节中始终使用粗体字体，最好的方法可能是启用 Latex 并添加\boldmath到您的序言中：
# Optionally set font to Computer Modern to avoid common missing font errors
matplotlib.rc('font', family='serif', serif='cm10')
matplotlib.rc('text', usetex=True)
matplotlib.rcParams['text.latex.preamble'] = [r'\boldmath']
Then your axis or figure labels can have any mathematical latex expression and still be bold:
那么你的轴或图形标签可以有任何数学乳胶表达式，并且仍然是粗体：
plt.xlabel(r'$\frac{\phi + x}{2}$')
However, for portions of labels that are not mathematical, you'll need to explicitly set them as bold:
但是，对于不是数学标签的部分，您需要将它们显式设置为粗体：
plt.ylabel(r'\textbf{Counts of} $\lambda$'}
回答by CJD
As this answer Latex on python: \alpha and \beta don't work?points out. You may have a problem with \bso \boldsymbolmay not work as anticipated. In that case you may use something like: '$ \\\boldsymbol{\\\beta} $'in your python code. Provided you use the preamble plt.rcParams['text.latex.preamble']=[r"\usepackage{amsmath}"]
作为这个答案Latex on python: \alpha and \beta 不起作用？指出。您可能有问题，\b因此\boldsymbol可能无法按预期工作。在这种情况下，您可以'$ \\\boldsymbol{\\\beta} $'在 python 代码中使用类似的东西。如果您使用序言plt.rcParams['text.latex.preamble']=[r"\usepackage{amsmath}"]
回答by sodoesaburningbus
In case anyone stumbles across this from Google like I did, another way that doesn't require adjusting the rc preamble (and conflicting with non-latex text) is:
如果有人像我一样从谷歌偶然发现这个，另一种不需要调整 rc 序言（并与非乳胶文本冲突）的方法是：
ax.set_ylabel(r"$\mathbf{\partial y / \partial x}$")
