text: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  
  """
  Plot 2 dimension data (version 1)
  """
  
  from mpl_toolkits.mplot3d import axes3d
  import matplotlib.pyplot as plt
  import numpy as np
  
  # Build datas ###############
  
  x = np.arange(-5, 5, 0.25)
  y = np.arange(-5, 5, 0.25)
  
  xx,yy = np.meshgrid(x, y)
  z = np.sin(np.sqrt(xx**2 + yy**2))
  
  # Plot data #################
  
  fig = plt.figure()
  ax = axes3d.Axes3D(fig)
  ax.plot_wireframe(xx, yy, z)
  
  # SAVE FILES ######################
  
  plt.savefig("demo1_mplot3d.png")
  
  # Plot ######################
  
  plt.show()
  