.. _pylab_examples-matshow:

pylab_examples example code: matshow.py
=======================================



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

::

    """Simple matshow() example."""
    import matplotlib.pyplot as plt
    import numpy as np
    
    
    def samplemat(dims):
        """Make a matrix with all zeros and increasing elements on the diagonal"""
        aa = np.zeros(dims)
        for i in range(min(dims)):
            aa[i, i] = i
        return aa
    
    # Display 2 matrices of different sizes
    dimlist = [(12, 12), (15, 35)]
    for d in dimlist:
        plt.matshow(samplemat(d))
    
    # Display a random matrix with a specified figure number and a grayscale
    # colormap
    plt.matshow(np.random.rand(64, 64), fignum=100, cmap=plt.cm.gray)
    
    plt.show()
    

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