matplotlib：为xticklabels添加特殊的数学符号

Question

我按照示例代码here生成条形图。我只想将上标 \ textdagger （†）添加到最后一个组名＆＃34; G5＆＃34;。这是我尝试过的（检查行ax.set_xticklabels）：

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()

但输出完全搞砸了。

我怎样才能获得适当的上标†＆＃34; G5＆＃34;然后？

Answer 1

在matplotlib中可以使用许多tex命令而无需使用tex本身;这叫做MathText。与tex命令一样，您可以使用两个美元符号附上MathText命令。

'G5$^\dagger$'

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

'G5$^\dagger$'