matplotlib 3D 数据

import matplotlib.pyplot as plt
import numpy as np
from mpl_toolkits.mplot3d import Axes3D

fig = plt.figure()
ax = Axes3D(fig)
# X, Y value
X = np.arange(-4,4,0.25)
Y = np.arange(-4,4,0.25)
X, Y = np.meshgrid(X, Y)
R = np.sqrt(X ** 2 + Y ** 2)
# height value
Z = np.sin(R)

ax.plot_surface(X, Y, Z, rstride=1,cstride=1,cmap=plt.get_cmap('rainbow'))
ax.contourf(X, Y,Z, zdir='z',offset=-2,cmap='rainbow')
ax.set_zlim(-2,2)

plt.show()