Version 3.1.1
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这是为X轴指定对数刻度的示例，使用 semilogx .
import matplotlib.pyplot as plt
import numpy as np
fig, ax = plt.subplots()
dt = 0.01
t = np.arange(dt, 20.0, dt)
ax.semilogx(t, np.exp(-t / 5.0))
ax.grid()
plt.show()