italic symbols in matplotlib?

问题

I'm trying to get the gamma symbol to be italicised in a plot label but can't figure out how to do it?

I thought this should work (but doesn't)

plt.xlabel(r'$\mathit{\Gamma}$$^{*}$')

I should add I am using the Helvetica font, so don't want to switch into tex mode, e.g. this doesn't work for me:

import matplotlib
import matplotlib.pyplot as plt

plt.rcParams['font.family'] = "sans-serif"
plt.rcParams['font.sans-serif'] = "Helvetica"
plt.rcParams['text.usetex'] = True
plt.plot(range(5), range(5))
plt.title('$\Gamma + \mathit{\Gamma}$', fontsize=40)
plt.show()

thanks,

Martin

回答1:

Write the text between '$$' that forces the text to be interpreted.

import matplotlib.pyplot as plt

plt.plot(range(5), range(5))
plt.title('$\it{text you want to show in italics}$')
plt.show()

回答2:

You should set usetex = True. See here.

import matplotlib
import matplotlib.pyplot as plt

matplotlib.rc('text', usetex = True)

plt.plot(range(5), range(5))
plt.title('$\Gamma + \mathit{\Gamma}$', fontsize=40)
plt.show()

Output:

回答3:

One solution I've found:

import matplotlib
import matplotlib.pyplot as plt

plt.rcParams['font.family'] = "sans-serif"
plt.rcParams['font.sans-serif'] = "Helvetica"
plt.rcParams['text.usetex'] = False
plt.plot(range(5), range(5))
plt.title(u'${\u0413}$', fontsize=20)
plt.show()

来源：https://stackoverflow.com/questions/32470137/italic-symbols-in-matplotlib