python - matplotlib:将特殊数学符号添加到 xticklabels

Question

我正在遵循示例代码 here生成条形图。我只想在最后一个组名“G5”上加一个上标\textdagger(†)。这是我尝试过的(检查 ax.set_xticklabels 行):

import numpy as np
import matplotlib
import matplotlib.pyplot as plt

N = 5
men_means = (20, 35, 30, 35, 27)
men_std = (2, 3, 4, 1, 2)

ind = np.arange(N)  # the x locations for the groups
width = 0.35       # the width of the bars
matplotlib.rc('text', usetex = True)
fig, ax = plt.subplots()
rects1 = ax.bar(ind, men_means, width, color='r', yerr=men_std)

women_means = (25, 32, 34, 20, 25)
women_std = (3, 5, 2, 3, 3)
rects2 = ax.bar(ind + width, women_means, width, color='y', yerr=women_std)

# add some text for labels, title and axes ticks
ax.set_ylabel('Scores')
ax.set_title('Scores by group and gender')
ax.set_xticks(ind + width)
ax.set_xticklabels(('G1', 'G2', 'G3', 'G4', 'G5\textsuperscript{\textdagger}'))

ax.legend((rects1[0], rects2[0]), ('Men', 'Women'))

def autolabel(rects):
    """
    Attach a text label above each bar displaying its height
    """
    for rect in rects:
        height = rect.get_height()
        ax.text(rect.get_x() + rect.get_width()/2., 1.05*height,
                '%d' % int(height),
                ha='center', va='bottom')

autolabel(rects1)
autolabel(rects2)

plt.show()

但是输出完全困惑了。

那我怎样才能得到“G5”的正确上标†呢？

Answer 1

许多tex命令可以在matplotlib中使用，而不需要使用tex本身；这称为 MathText。与 tex 命令一样，您可以使用两个美元符号将 MathText 命令括起来。

'G5$^\dagger$'

现在，即使您使用 tex (plt.rc('text', usetex = True)) 命令也保持不变:

'G5$^\dagger$'