Matplotlib - Mathematical Expressions

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You can use a subset TeXmarkup in any Matplotlib text string by placing it inside a pair of dollar signs ($).

# math text
plt.title(r'$\alpha > \beta$')

To make subscripts and superscripts, use the '_' and '^' symbols −

r'$\alpha_i> \beta_i$'

import numpy as np
import matplotlib.pyplot as plt
t = np.arange(0.0, 2.0, 0.01)
s = np.sin(2*np.pi*t)

plt.plot(t,s)
plt.title(r'$\alpha_i> \beta_i$', fontsize=20)

plt.text(0.6, 0.6, r'$\mathcal{A}\mathrm{sin}(2 \omega t)$', fontsize = 20)
plt.text(0.1, -0.5, r'$\sqrt{2}$', fontsize=10)
plt.xlabel('time (s)')
plt.ylabel('volts (mV)')
plt.show()

The above line of code will generate the following output −