add text to plot matplotlib code example

Example: add text to plot python

import matplotlib.pyplot as plt
w = 4
h = 3
d = 70
plt.figure(figsize=(w, h), dpi=d)
x = [1, 2, 4]
x_pos = 0.5
y_pos = 3
plt.text(x_pos, y_pos, "text on plot")
plt.plot(x)
plt.savefig("out.png")Outputout.png