matplotlib应用

#-*- coding:utf-8 -*-
#
import numpy as np
import matplotlib.pyplot as plt

x = np.linspace(0,10,1000)
y = np.sin(x)+1
z = np.cos(x**2)+1

plt.figure(figsize=(8,4))
plt.plot(x,y,label = '$\sin x+1$',color = 'red',linewidth=2)
plt.plot(x,z,'b--',label = '$\cos x^2+1$')
plt.xlabel('Time(s)')
plt.ylabel('Volt')
plt.title('A Simple Example')
plt.ylim(0,2.2)
plt.legend()
plt.show()

matplotlib是数据分析时常用的作图代码，此例中依赖上级库numpy