matplotlib是python的一个绘图库

安装matplotlib

python -mpip install -U pip
python -mpip install -U matplotlib

创建简单的Plot

引入类库

import matplotlib.pyplot as plt
import numpy as np

创建数据

t = np.arange(0.0, 2.0, 0.01)
s = 1 + np.sin(2 * np.pi * t)

创建plot,并填充数据

fig, ax = plt.subplots()
ax.plot(t, s)

设置plot标签

ax.set(xlabel='time (s)', ylabel='voltage (mV)',
       title='About as simple as it gets, folks')
ax.grid()

显示图像

plt.show()

保存图片

fig.savefig("test.png")

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