# Vlak

import matplotlib.pyplot as plt
import numpy as np

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

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

x = np.arange (-1, 1, 0.05)
y = np.arange (-1, 1, 0.05)

x, y = np.meshgrid (x, y)
z = x**2 * np.exp (y)

ax.plot_surface (x, y, z, color = "red")

plt.show ()