在matplotlib图例中为文本加下划线

Question

我需要在图例下面加一段下划线的文字。我在这里找到一个相关的问题，但我完全不懂LaTeX。我想在图例中给“Content determined from gamma spectroscopy”加下划线（代码的第53行）。我尝试按照链接中的方法做：

r'\underline{Content determined from gamma spectroscopy} ',

但是那段文字在图例中只是原样显示出来了。我到底该怎么给文字加下划线呢？

import matplotlib.pyplot as plt
from matplotlib.patches import Rectangle

eu_cl = 0.1
co_cl = 2.0

ca_eu_gs = 0.05 / eu_cl
ca_co_gs = 0.46 / co_cl
fa_eu_gs = 0.11 / eu_cl
fa_co_gs = 0.76 / co_cl
ce_eu_gs = 0.03 / eu_cl
ce_co_gs = 0.26 / co_cl

ca_eu_ms = 0.04 / eu_cl
ca_co_ms = 1.05 / co_cl
fa_eu_ms = 0.01 / eu_cl
fa_co_ms = 1.85 / co_cl
ce_eu_ms = 0.08 / eu_cl
ce_co_ms = 1.44 / co_cl

y_co = [1,1,1,1,1,1,1e-1,1e-2,1e-3,0]
x_co = [0,1e-4,1e-3,1e-2,1e-1,1e0,1e0,1e0,1e0,1e0]
#y_eu = [0, 1e-3, 1e-2, 1e-1, 1e0]
#x_eu = [1,1,1,1,1] 

plt.rcParams['legend.loc'] = 'best'
plt.figure(1)
plt.ylim(1e-3, 1e4)
plt.xlim(1e-4, 1e3)
#plt.autoscale(enable=True, axis='y', tight=None)
#plt.autoscale(enable=True, axis='x', tight=None)
ca_gs = plt.scatter(ca_eu_gs, ca_co_gs, color='b', marker='o')

fa_gs = plt.scatter(fa_eu_gs, fa_co_gs, color='r', marker='o')

ce_gs = plt.scatter(ce_eu_gs, ce_co_gs, color='m', marker='o')

ca_ms = plt.scatter(ca_eu_ms, ca_co_ms, color='b', marker='^')

fa_ms = plt.scatter(fa_eu_ms, fa_co_ms, color='r', marker='^')

ce_ms = plt.scatter(ce_eu_ms, ce_co_ms, color='m', marker='^')

extra = Rectangle((0, 0), 1, 1, fc="w", fill=False, edgecolor='none', linewidth=0)
extra1 = Rectangle((0, 0), 1, 1, fc="w", fill=False, edgecolor='none', linewidth=0)

clearance, = plt.plot(x_co, y_co, color='g')
#plt.plot(x_eu, y_eu, color='g')

plt.loglog()
plt.xlabel('Europium (ppm)')
plt.ylabel('Cobalt (ppm)')
plt.legend([extra, ca_gs, fa_gs, ce_gs, extra1, ca_ms, fa_ms, ce_ms , clearance], ("Content determined from gamma spectroscopy" ,
            "Coarse aggregate","Fine aggregate","Cement","Content determined from ICP-MS","Coarse aggregate","Fine aggregate","Cement","D/C = 1")
             , scatterpoints = 1)
print('plots created')
plt.show()

编辑：

我按照评论中提到的，添加了以下内容来启用LaTeX：

rc('text', usetex=True)

但这导致了一堆错误，最后出现了以下错误：

RuntimeError: LaTeX was not able to process the following string:
'$10^{-4}$'
Here is the full report generated by LaTeX:

我猜这可能是因为我现在必须用LaTeX格式化我所有的文字。有没有办法只用LaTeX格式化其中一部分呢？我对LaTeX没有经验，现在也不是学习它的好时机（不过我总有一天会学的）。

错误处理数据可视化 matplotlib 文本格式化图例 latex 下划线 gamma spectroscopy

在matplotlib图例中为文本加下划线

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