.. _mplot3d-scatter3d_demo:

mplot3d example code: scatter3d_demo.py
=======================================



.. plot:: /home/tcaswell/source/p/matplotlib/doc/mpl_examples/mplot3d/scatter3d_demo.py

::

    '''
    ==============
    3D scatterplot
    ==============
    
    Demonstration of a basic scatterplot in 3D.
    '''
    
    from mpl_toolkits.mplot3d import Axes3D
    import matplotlib.pyplot as plt
    import numpy as np
    
    
    def randrange(n, vmin, vmax):
        '''
        Helper function to make an array of random numbers having shape (n, )
        with each number distributed Uniform(vmin, vmax).
        '''
        return (vmax - vmin)*np.random.rand(n) + vmin
    
    fig = plt.figure()
    ax = fig.add_subplot(111, projection='3d')
    
    n = 100
    
    # For each set of style and range settings, plot n random points in the box
    # defined by x in [23, 32], y in [0, 100], z in [zlow, zhigh].
    for c, m, zlow, zhigh in [('r', 'o', -50, -25), ('b', '^', -30, -5)]:
        xs = randrange(n, 23, 32)
        ys = randrange(n, 0, 100)
        zs = randrange(n, zlow, zhigh)
        ax.scatter(xs, ys, zs, c=c, marker=m)
    
    ax.set_xlabel('X Label')
    ax.set_ylabel('Y Label')
    ax.set_zlabel('Z Label')
    
    plt.show()
    

Keywords: python, matplotlib, pylab, example, codex (see :ref:`how-to-search-examples`)