matplotlib.pyplot画图

import numpy as np
import matplotlib.pyplot as plt

a = [1,2,3,4,5,6]
b = [3,8,5,4,5,8]
c = np.array([3,4,5])
d = np.array([2,4,6])
plt.plot(a,b,'r-')          #折线图
plt.plot(c,d,'r--',lw=10)  #lw为线条宽度
plt.bar(a,b,0.5,alpha=0.5,color='b')        # 5 颜色 4 透明度 3 柱宽度
plt.show()