.. _pylab_examples-spy_demos: pylab_examples example code: spy_demos.py ========================================= .. plot:: /home/tcaswell/other_source/matplotlib/doc/mpl_examples/pylab_examples/spy_demos.py :: """ Plot the sparsity pattern of arrays """ from matplotlib.pyplot import figure, show import numpy fig = figure() ax1 = fig.add_subplot(221) ax2 = fig.add_subplot(222) ax3 = fig.add_subplot(223) ax4 = fig.add_subplot(224) x = numpy.random.randn(20,20) x[5] = 0. x[:,12] = 0. ax1.spy(x, markersize=5) ax2.spy(x, precision=0.1, markersize=5) ax3.spy(x) ax4.spy(x, precision=0.1) show() Keywords: python, matplotlib, pylab, example, codex (see :ref:`how-to-search-examples`)