#!/usr/bin/env python
 
"""This generates the graph of the function f(x, y) = sin(sqrt(x^2 + y^2))."""
# Author: Ika. 2015-08-08

from matplotlib import cm
from mpl_toolkits.mplot3d import Axes3D
import matplotlib.pyplot as plt
import numpy as np

fig = plt.figure()
ax = fig.gca(projection='3d')
X = np.arange(-5, 5, 0.25)
Y = np.arange(-5, 5, 0.25)
X, Y = np.meshgrid(X, Y)
R = np.sqrt(X*X + Y*Y)
Z = np.sin(R)
surf = ax.plot_surface(X, Y, Z, rstride=1, cstride=1, cmap=cm.coolwarm)

plt.savefig("matplotlib_3d.svg")