.. only:: html
.. note::
:class: sphx-glr-download-link-note
Click :ref:`here ` to download the full example code
.. rst-class:: sphx-glr-example-title
.. _sphx_glr_gallery_mplot3d_tricontourf3d.py:
=================================
Triangular 3D filled contour plot
=================================
Filled contour plots of unstructured triangular grids.
The data used is the same as in the second plot of trisurf3d_demo2.
tricontour3d_demo shows the unfilled version of this example.
.. image:: /gallery/mplot3d/images/sphx_glr_tricontourf3d_001.png
:alt: tricontourf3d
:class: sphx-glr-single-img
.. code-block:: default
import matplotlib.pyplot as plt
import matplotlib.tri as tri
import numpy as np
# First create the x, y, z coordinates of the points.
n_angles = 48
n_radii = 8
min_radius = 0.25
# Create the mesh in polar coordinates and compute x, y, z.
radii = np.linspace(min_radius, 0.95, n_radii)
angles = np.linspace(0, 2*np.pi, n_angles, endpoint=False)
angles = np.repeat(angles[..., np.newaxis], n_radii, axis=1)
angles[:, 1::2] += np.pi/n_angles
x = (radii*np.cos(angles)).flatten()
y = (radii*np.sin(angles)).flatten()
z = (np.cos(radii)*np.cos(3*angles)).flatten()
# Create a custom triangulation.
triang = tri.Triangulation(x, y)
# Mask off unwanted triangles.
triang.set_mask(np.hypot(x[triang.triangles].mean(axis=1),
y[triang.triangles].mean(axis=1))
< min_radius)
fig = plt.figure()
ax = fig.gca(projection='3d')
ax.tricontourf(triang, z, cmap=plt.cm.CMRmap)
# Customize the view angle so it's easier to understand the plot.
ax.view_init(elev=45.)
plt.show()
.. _sphx_glr_download_gallery_mplot3d_tricontourf3d.py:
.. only :: html
.. container:: sphx-glr-footer
:class: sphx-glr-footer-example
.. container:: sphx-glr-download sphx-glr-download-python
:download:`Download Python source code: tricontourf3d.py `
.. container:: sphx-glr-download sphx-glr-download-jupyter
:download:`Download Jupyter notebook: tricontourf3d.ipynb `
.. only:: html
.. rst-class:: sphx-glr-signature
Keywords: matplotlib code example, codex, python plot, pyplot
`Gallery generated by Sphinx-Gallery
`_