# Implementation of matplotlib function
import matplotlib.pyplot as plt
import matplotlib.tri as mtri
import numpy as np
x = np.asarray([0, 1, 2, 3, 0.5,
1.5, 2.5, 1, 2,
1.5])
y = np.asarray([0, 0, 0, 0, 1.0,
1.0, 1.0, 2, 2,
3.0])
triangles = [[0, 1, 4], [1, 5, 4],
[2, 6, 5], [4, 5, 7],
[5, 6, 8], [5, 8, 7],
[7, 8, 9], [1, 2, 5],
[2, 3, 6]]
triang = mtri.Triangulation(x, y, triangles)
z = np.cos(1.5 * x) * np.cos(1.5 * y)
fig, axs = plt.subplots()
axs.tricontourf(triang, z)
axs.triplot(triang, 'go-', color ='white')
axs.set_axis_off()
axs.set_title('matplotlib.axes.Axes.set_axis_off()\
Example', fontsize = 10, fontweight ='bold')
plt.show()