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# 3D surface (checkerboard)

Demonstrates plotting a 3D surface colored in a checkerboard pattern.

    from mpl_toolkits.mplot3d import Axes3D
    import matplotlib.pyplot as plt
    from matplotlib import cm
    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()

Total running time of the script: ( 0 minutes 0.074 seconds)

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