.. _pylab_examples-hexbin_demo:

pylab_examples example code: hexbin_demo.py
===========================================



.. plot:: /home/tcaswell/source/p/matplotlib/doc/mpl_examples/pylab_examples/hexbin_demo.py

::

    """
    hexbin is an axes method or pyplot function that is essentially
    a pcolor of a 2-D histogram with hexagonal cells.  It can be
    much more informative than a scatter plot; in the first subplot
    below, try substituting 'scatter' for 'hexbin'.
    """
    
    import numpy as np
    import matplotlib.pyplot as plt
    
    np.random.seed(0)
    n = 100000
    x = np.random.standard_normal(n)
    y = 2.0 + 3.0 * x + 4.0 * np.random.standard_normal(n)
    xmin = x.min()
    xmax = x.max()
    ymin = y.min()
    ymax = y.max()
    
    fig, axs = plt.subplots(ncols=2, sharey=True, figsize=(7, 4))
    fig.subplots_adjust(hspace=0.5, left=0.07, right=0.93)
    ax = axs[0]
    hb = ax.hexbin(x, y, gridsize=50, cmap='inferno')
    ax.axis([xmin, xmax, ymin, ymax])
    ax.set_title("Hexagon binning")
    cb = fig.colorbar(hb, ax=ax)
    cb.set_label('counts')
    
    ax = axs[1]
    hb = ax.hexbin(x, y, gridsize=50, bins='log', cmap='inferno')
    ax.axis([xmin, xmax, ymin, ymax])
    ax.set_title("With a log color scale")
    cb = fig.colorbar(hb, ax=ax)
    cb.set_label('log10(N)')
    
    plt.show()
    

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