import scipy.io as sio

from mpl_toolkits.mplot3d import Axes3D

import matplotlib.pyplot as plt

a = [1,2,3,4,5]

b = [1,2,3,4,5]

c = [1,2,3,4,5]

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

ax.scatter(a,b,c,c='r')

ax.set_zlabel('Z')

ax.set_ylabel('Y')

ax.set_xlabel('X')

plt.show()