matplotlib中图例中标签的样式部分

Question

是否可以使用特定样式的图例文本的一部分，例如粗体或斜体？

Answer 1

As silvado mentions in his comment, you can use LaTeX rendering for more flexible control of the text rendering. See here for more information: http://matplotlib.org/users/usetex.html

An example:

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

# activate latex text rendering
rc('text', usetex=True)

x = np.arange(10)
y = np.random.random(10)
z = np.random.random(10)

fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot(x, y, label = r"This is \textbf{line 1}")
ax.plot(x, z, label = r"This is \textit{line 2}")
ax.legend()
plt.show()

Note the 'r' before the strings of the labels. Because of this the \\ will be treated as a latex command and not interpreted as python would do (so you can type \\textbf instead of \\\\textbf ).

Answer 2

Write between '$$'to force matplotlib to interpret it.

import matplotlib.pyplot as plt

plt.plot(range(10), range(10), label = "Normal text $\it{Italics}$")
plt.legend()
plt.show()

Answer 3

Adding more options to the above answer by fixing the issues with that answer, with OO interface not just the state-based pyplot interface, possibility to have spaces as part of the text, boldface option in addition to italics :

ax.legend(handles=legend_handles,
          labels=legend_labels,
          loc='upper right',
          shadow=True,
          fancybox=True,
          facecolor='#C19A6B',
          title="$\\bf{BOLDFACED\ TITLE}$",     # to boldface title with space in between
          prop={'size': 12, 'style': 'italic'}  # properties for legend text
         )

For italicized title with space in between replace the above title with,

 title="$\\it{ITALICIZED\ TITLE}$",