import numpy as np
import matplotlib.pyplot as plt
plt.figure(1)
plt.figure(2)
ax1 = plt.subplot(211)
ax2 = plt.subplot(212)
x = np.linspace(0, 3, 100)
for i in xrange(5):
plt.figure(1)
plt.plot(x, np.exp(i*x/3))
plt.sca(ax1)
plt.plot(x, np.sin(i*x))
plt.sca(ax2)
plt.plot(x, np.cos(i*x))
plt.show()
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
