.. _axes_grid-inset_locator_demo2:

axes_grid example code: inset_locator_demo2.py
==============================================



.. plot:: /home/mandrake/rpm/BUILD/matplotlib-1.1.1/doc/mpl_examples/axes_grid/inset_locator_demo2.py

::

    import matplotlib.pyplot as plt
    
    from mpl_toolkits.axes_grid1.inset_locator import zoomed_inset_axes
    from mpl_toolkits.axes_grid1.inset_locator import mark_inset
    
    import numpy as np
    
    def get_demo_image():
        from matplotlib.cbook import get_sample_data
        import numpy as np
        f = get_sample_data("axes_grid/bivariate_normal.npy", asfileobj=False)
        z = np.load(f)
        # z is a numpy array of 15x15
        return z, (-3,4,-4,3)
    
    
    fig = plt.figure(1, [5,4])
    ax = fig.add_subplot(111)
    
    # prepare the demo image
    Z, extent = get_demo_image()
    Z2 = np.zeros([150, 150], dtype="d")
    ny, nx = Z.shape
    Z2[30:30+ny, 30:30+nx] = Z
    
    # extent = [-3, 4, -4, 3]
    ax.imshow(Z2, extent=extent, interpolation="nearest",
              origin="lower")
    
    axins = zoomed_inset_axes(ax, 6, loc=1) # zoom = 6
    axins.imshow(Z2, extent=extent, interpolation="nearest",
                 origin="lower")
    
    # sub region of the original image
    x1, x2, y1, y2 = -1.5, -0.9, -2.5, -1.9
    axins.set_xlim(x1, x2)
    axins.set_ylim(y1, y2)
    
    plt.xticks(visible=False)
    plt.yticks(visible=False)
    
    # draw a bbox of the region of the inset axes in the parent axes and
    # connecting lines between the bbox and the inset axes area
    mark_inset(ax, axins, loc1=2, loc2=4, fc="none", ec="0.5")
    
    plt.draw()
    plt.show()
    
    

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