refer to: https://blog.csdn.net/weixin_44047008/article/details/121192130

matplotlib纵坐标轴保留两位小数

import numpy as np
import matplotlib.pyplot as plt
import matplotlib.ticker as mtick

fig = plt.figure()

ax = fig.add_subplot(111)

x = np.linspace(0, 300, 20)

y = np.linspace(0,300, 20)
y = y*1e16

ax.plot(x,y)

ax.yaxis.set_major_formatter(mtick.FormatStrFormatter('%.2f'))

plt.show()
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原文链接：https://blog.csdn.net/weixin_44047008/article/details/121192130