.. _mplot3d-tricontour3d_demo: mplot3d example code: tricontour3d_demo.py ========================================== .. plot:: /home/tcaswell/other_source/matplotlib/doc/mpl_examples/mplot3d/tricontour3d_demo.py :: """ Contour plots of unstructured triangular grids. """ import matplotlib.pyplot as plt from mpl_toolkits.mplot3d import Axes3D import matplotlib.tri as tri import numpy as np import math # First create the x and y coordinates of the points. n_angles = 48 n_radii = 8 min_radius = 0.25 radii = np.linspace(min_radius, 0.95, n_radii) angles = np.linspace(0, 2*math.pi, n_angles, endpoint=False) angles = np.repeat(angles[...,np.newaxis], n_radii, axis=1) angles[:,1::2] += math.pi/n_angles x = (radii*np.cos(angles)).flatten() y = (radii*np.sin(angles)).flatten() z = (np.cos(radii)*np.cos(angles*3.0)).flatten() # Create a custom triangulation triang = tri.Triangulation(x, y) # Mask off unwanted triangles. xmid = x[triang.triangles].mean(axis=1) ymid = y[triang.triangles].mean(axis=1) mask = np.where(xmid*xmid + ymid*ymid < min_radius*min_radius, 1, 0) triang.set_mask(mask) plt.figure() plt.gca(projection='3d') plt.tricontour(triang, z) plt.show() Keywords: python, matplotlib, pylab, example, codex (see :ref:`how-to-search-examples`)