# 2D-vectorveld

import matplotlib.pyplot as plt
import numpy as np

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

x, y = np.meshgrid (np.linspace (-5, 5, 10), np.linspace (-5, 5, 10))

u = (x - y) / np.sqrt (x**2 + y**2)
v = (x + y) / np.sqrt (x**2 + y**2)

plt.quiver (x, y, u, v, color = "blue")

plt.xlim (-7, 7)
plt.ylim (-7, 7)

plt.grid ()
plt.show ()