.. _pylab_examples-image_nonuniform:

pylab_examples example code: image_nonuniform.py
================================================



.. plot:: /home/tcaswell/src/p/matplotlib/doc/mpl_examples/pylab_examples/image_nonuniform.py

::

    '''
    This illustrates the NonUniformImage class.  It is not
    available via an Axes method but it is easily added to an
    Axes instance as shown here.
    '''
    
    import numpy as np
    import matplotlib.pyplot as plt
    from matplotlib.image import NonUniformImage
    from matplotlib import cm
    
    interp = 'nearest'
    
    # Linear x array for cell centers:
    x = np.linspace(-4, 4, 9)
    
    # Highly nonlinear x array:
    x2 = x**3
    
    y = np.linspace(-4, 4, 9)
    
    z = np.sqrt(x[np.newaxis, :]**2 + y[:, np.newaxis]**2)
    
    fig, axs = plt.subplots(nrows=2, ncols=2)
    fig.subplots_adjust(bottom=0.07, hspace=0.3)
    fig.suptitle('NonUniformImage class', fontsize='large')
    ax = axs[0, 0]
    im = NonUniformImage(ax, interpolation=interp, extent=(-4, 4, -4, 4),
                         cmap=cm.Purples)
    im.set_data(x, y, z)
    ax.images.append(im)
    ax.set_xlim(-4, 4)
    ax.set_ylim(-4, 4)
    ax.set_title(interp)
    
    ax = axs[0, 1]
    im = NonUniformImage(ax, interpolation=interp, extent=(-64, 64, -4, 4),
                         cmap=cm.Purples)
    im.set_data(x2, y, z)
    ax.images.append(im)
    ax.set_xlim(-64, 64)
    ax.set_ylim(-4, 4)
    ax.set_title(interp)
    
    interp = 'bilinear'
    
    ax = axs[1, 0]
    im = NonUniformImage(ax, interpolation=interp, extent=(-4, 4, -4, 4),
                         cmap=cm.Purples)
    im.set_data(x, y, z)
    ax.images.append(im)
    ax.set_xlim(-4, 4)
    ax.set_ylim(-4, 4)
    ax.set_title(interp)
    
    ax = axs[1, 1]
    im = NonUniformImage(ax, interpolation=interp, extent=(-64, 64, -4, 4),
                         cmap=cm.Purples)
    im.set_data(x2, y, z)
    ax.images.append(im)
    ax.set_xlim(-64, 64)
    ax.set_ylim(-4, 4)
    ax.set_title(interp)
    
    plt.show()
    

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