Matplotlib基本操作

1、plot线

2、scatter散点图

3、bar状图

# -*- coding: utf-8 -*-"""Created on Sun Jul  9 17:20:30 2017@author: tfygg"""import matplotlib.pyplot as pltimport numpy as npx = np.linspace(-10,10,20)y = 2*x+1z= x**2plt.figure()plt.plot(x, y,label = 'y')plt.plot(x, z, color='red',linestyle='--',label='z')plt.legend(loc='upper right')plt.show()plt.figure()plt.scatter(x,z)plt.show()plt.figure()plt.bar(x,z)plt.show()