import matplotlib.pyplot as plt
import numpy as np

x = np.arange(0, 10, 0.2)
y1 = np.cos(x)
y2 = np.sin(x)

plt.plot(x, y1, "o", linewidth=3, color=(0.2, 0.1, 0.4))
# plt.hold(True)
plt.plot(x, y2, "-", linewidth=2, color="g")
plt.grid()
plt.axis("equal")
plt.xlabel("x")
plt.ylabel("y")
plt.title("Ejemplito")
plt.show()