.. 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_surface3d_3.py: ========================= 3D surface (checkerboard) ========================= Demonstrates plotting a 3D surface colored in a checkerboard pattern. .. image:: /gallery/mplot3d/images/sphx_glr_surface3d_3_001.png :class: sphx-glr-single-img .. code-block:: python # This import registers the 3D projection, but is otherwise unused. from mpl_toolkits.mplot3d import Axes3D # noqa: F401 unused import import matplotlib.pyplot as plt from matplotlib.ticker import LinearLocator import numpy as np fig = plt.figure() ax = fig.gca(projection='3d') # Make data. X = np.arange(-5, 5, 0.25) xlen = len(X) Y = np.arange(-5, 5, 0.25) ylen = len(Y) X, Y = np.meshgrid(X, Y) R = np.sqrt(X**2 + Y**2) Z = np.sin(R) # Create an empty array of strings with the same shape as the meshgrid, and # populate it with two colors in a checkerboard pattern. colortuple = ('y', 'b') colors = np.empty(X.shape, dtype=str) for y in range(ylen): for x in range(xlen): colors[x, y] = colortuple[(x + y) % len(colortuple)] # Plot the surface with face colors taken from the array we made. surf = ax.plot_surface(X, Y, Z, facecolors=colors, linewidth=0) # Customize the z axis. ax.set_zlim(-1, 1) ax.w_zaxis.set_major_locator(LinearLocator(6)) plt.show() .. _sphx_glr_download_gallery_mplot3d_surface3d_3.py: .. only :: html .. container:: sphx-glr-footer :class: sphx-glr-footer-example .. container:: sphx-glr-download :download:`Download Python source code: surface3d_3.py ` .. container:: sphx-glr-download :download:`Download Jupyter notebook: surface3d_3.ipynb ` .. only:: html .. rst-class:: sphx-glr-signature Keywords: matplotlib code example, codex, python plot, pyplot `Gallery generated by Sphinx-Gallery `_