.. _pylab_examples-image_demo:

pylab_examples example code: image_demo.py
==========================================



.. plot:: /builddir/build/BUILD/matplotlib-1.2.0/doc/mpl_examples/pylab_examples/image_demo.py

::

    #!/usr/bin/env python
    import numpy as np
    import matplotlib.cm as cm
    import matplotlib.mlab as mlab
    import matplotlib.pyplot as plt
    
    delta = 0.025
    x = y = np.arange(-3.0, 3.0, delta)
    X, Y = np.meshgrid(x, y)
    Z1 = mlab.bivariate_normal(X, Y, 1.0, 1.0, 0.0, 0.0)
    Z2 = mlab.bivariate_normal(X, Y, 1.5, 0.5, 1, 1)
    Z = Z2-Z1  # difference of Gaussians
    
    im = plt.imshow(Z, interpolation='bilinear', cmap=cm.RdYlGn,
                    origin='lower', extent=[-3,3,-3,3],
                    vmax=abs(Z).max(), vmin=-abs(Z).max())
    
    plt.show()
    
    

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