Answers for "set title size matplotlib"

matplotlib plot title font size

from matplotlib import pyplot as plt    

fig = plt.figure()
plt.plot(data)
fig.suptitle('test title', fontsize=20)
plt.xlabel('xlabel', fontsize=18)
plt.ylabel('ylabel', fontsize=16)
fig.savefig('test.jpg')

change title size matplotlib

ax[0].set_title("Random Excitation Signal", fontsize = 15)