from mpl_toolkits.mplot3d import Axes3D
import matplotlib.pyplot as plt
import numpy as np
from pylab import *
Z=np.loadtxt('electr.dat')

fig = plt.figure()
ax = Axes3D(fig)
x = np.arange(1,501,1)
y = np.arange(1,501,1)
X, Y = np.meshgrid(x, y)

#print(x)

ax.plot_surface(X,Y,Z)
plt.show()