import numpy as np
import matplotlib.pyplot as plt
x = np.linspace(0, 2 * np.pi, 10)
y = np.sin(x)
plt.figure()
plt.quiver(x[:-1], y[:-1], x[1:] - x[:-1], y[1:] - y[:-1], scale_units='xy',
    angles='xy', scale=1)
plt.show()
Line plot with arrows in matplotlib