使用python绘制二元函数图像的实例

#coding:utf-8
import numpy as np
import matplotlib.pyplot as plt
from mpl_toolkits.mplot3d import Axes3D


def function_2(x,y):
   #  这里的函数可以任意定义

   return np.sum(x**2) 
  

fig = plt.figure()
ax = Axes3D(fig)
x = np.arange(-3,-3,0.1)
y = np.arange(-3,-3,0.1)
X,Y = np.meshgrid(x,y)#创建网格，这个是关键
Z = function_2(X,Y)
plt.xlabel('x')
plt.ylabel('y')

ax.plot_surface(X,Y,Z,rstride=1,cstride=1,cmap='rainbow')
plt.show()