.. _pylab_examples-image_slices_viewer: pylab_examples example code: image_slices_viewer.py =================================================== .. plot:: /home/mdboom/Work/builds/matplotlib/doc/mpl_examples/pylab_examples/image_slices_viewer.py :: from __future__ import print_function import numpy from matplotlib.pyplot import figure, show class IndexTracker: def __init__(self, ax, X): self.ax = ax ax.set_title('use scroll wheel to navigate images') self.X = X rows,cols,self.slices = X.shape self.ind = self.slices/2 self.im = ax.imshow(self.X[:,:,self.ind]) self.update() def onscroll(self, event): print ("%s %s" % (event.button, event.step)) if event.button=='up': self.ind = numpy.clip(self.ind+1, 0, self.slices-1) else: self.ind = numpy.clip(self.ind-1, 0, self.slices-1) self.update() def update(self): self.im.set_data(self.X[:,:,self.ind]) ax.set_ylabel('slice %s'%self.ind) self.im.axes.figure.canvas.draw() fig = figure() ax = fig.add_subplot(111) X = numpy.random.rand(20,20,40) tracker = IndexTracker(ax, X) fig.canvas.mpl_connect('scroll_event', tracker.onscroll) show() Keywords: python, matplotlib, pylab, example, codex (see :ref:`how-to-search-examples`)