<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">import matplotlib.pyplot as plt
import numpy as np

dt = 0.01
t = np.arange(dt, 20.0, dt)

plt.semilogx(t, np.exp(-t/5.0))
plt.grid(True)

plt.show()
</pre></body></html>