.. _pylab_examples-shading_example: pylab_examples example code: shading_example.py =============================================== .. plot:: /home/tcaswell/other_source/matplotlib/doc/mpl_examples/pylab_examples/shading_example.py :: import numpy as np import matplotlib.pyplot as plt from matplotlib.colors import LightSource # example showing how to make shaded relief plots # like Mathematica # (http://reference.wolfram.com/mathematica/ref/ReliefPlot.html) # or Generic Mapping Tools # (http://gmt.soest.hawaii.edu/gmt/doc/gmt/html/GMT_Docs/node145.html) # test data X,Y=np.mgrid[-5:5:0.05,-5:5:0.05] Z=np.sqrt(X**2+Y**2)+np.sin(X**2+Y**2) # create light source object. ls = LightSource(azdeg=0,altdeg=65) # shade data, creating an rgb array. rgb = ls.shade(Z,plt.cm.copper) # plot un-shaded and shaded images. plt.figure(figsize=(12,5)) plt.subplot(121) plt.imshow(Z,cmap=plt.cm.copper) plt.title('imshow') plt.xticks([]); plt.yticks([]) plt.subplot(122) plt.imshow(rgb) plt.title('imshow with shading') plt.xticks([]); plt.yticks([]) plt.show() Keywords: python, matplotlib, pylab, example, codex (see :ref:`how-to-search-examples`)