python-三维图形的绘制

import matplotlib.pyplot as plt

import mpl_toolkits.axisartist as axis

import numpy as np

import mpl_toolkits.mplot3d

x,y = np.mgrid[-2:2:20j,-2:2:20j]

z = (x**2 + y**2)

'''

三维建模

'''

ax = plt.subplot(111, projection='3d')

ax.set_title('f(x,y)=x^2+y^2')

ax.plot_surface(x,y,z,rstride=9, cstride=1, cmap=plt.cm.Blues_r)

ax.set_xlabel('x')

ax.set_ylabel('y')

ax.set_zlabel('z')

plt.show()