# 3D-vectorveld

import matplotlib.pyplot as plt
import numpy as np

x, y, z = np.meshgrid (np.arange (-2, 2, 0.6), np.arange (-2, 2, 0.6), np.arange (-2, 2, 0.6))
 
u = - y / np.sqrt (x**2 + y**2 + z**2)
v = x / np.sqrt (x**2 + y**2 + z**2)
w = 0

plt.figure (figsize = (8, 8))

ax = plt.axes (projection = "3d")

q = ax.quiver (x, y, z, u, v, w, color = "green", length = 0.5)

plt.show ()