Matplotlib基本操作

Posted 2022-10-17 ayanwan

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 plt
import numpy as np

x = np.linspace(-10,10,20)

y = 2*x+1
z= x**2

plt.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()