.. _pylab_examples-legend_auto: pylab_examples example code: legend_auto.py =========================================== .. plot:: /home/mdboom/Work/builds/matplotlib/doc/mpl_examples/pylab_examples/legend_auto.py :: """ This file was written to test matplotlib's autolegend placement algorithm, but shows lots of different ways to create legends so is useful as a general examples Thanks to John Gill and Phil ?? for help at the matplotlib sprint at pycon 2005 where the auto-legend support was written. """ from pylab import * import sys rcParams['legend.loc'] = 'best' N = 100 x = arange(N) def fig_1(): figure(1) t = arange(0, 40.0 * pi, 0.1) l, = plot(t, 100*sin(t), 'r', label='sine') legend(framealpha=0.5) def fig_2(): figure(2) plot(x, 'o', label='x=y') legend() def fig_3(): figure(3) plot(x, -x, 'o', label='x= -y') legend() def fig_4(): figure(4) plot(x, ones(len(x)), 'o', label='y=1') plot(x, -ones(len(x)), 'o', label='y=-1') legend() def fig_5(): figure(5) n, bins, patches = hist(randn(1000), 40, normed=1) l, = plot(bins, normpdf(bins, 0.0, 1.0), 'r--', label='fit', linewidth=3) legend([l, patches[0]], ['fit', 'hist']) def fig_6(): figure(6) plot(x, 50-x, 'o', label='y=1') plot(x, x-50, 'o', label='y=-1') legend() def fig_7(): figure(7) xx = x - (N/2.0) plot(xx, (xx*xx)-1225, 'bo', label='\$y=x^2\$') plot(xx, 25*xx, 'go', label='\$y=25x\$') plot(xx, -25*xx, 'mo', label='\$y=-25x\$') legend() def fig_8(): figure(8) b1 = bar(x, x, color='m') b2 = bar(x, x[::-1], color='g') legend([b1[0], b2[0]], ['up', 'down']) def fig_9(): figure(9) b1 = bar(x, -x) b2 = bar(x, -x[::-1], color='r') legend([b1[0], b2[0]], ['down', 'up']) def fig_10(): figure(10) b1 = bar(x, x, bottom=-100, color='m') b2 = bar(x, x[::-1], bottom=-100, color='g') b3 = bar(x, -x, bottom=100) b4 = bar(x, -x[::-1], bottom=100, color='r') legend([b1[0], b2[0], b3[0], b4[0]], ['bottom right', 'bottom left', 'top left', 'top right']) if __name__ == '__main__': nfigs = 10 figures = [] for f in sys.argv[1:]: try: figures.append(int(f)) except ValueError: pass if len(figures) == 0: figures = range(1, nfigs+1) for fig in figures: fn_name = "fig_%d" % fig fn = globals()[fn_name] fn() show() Keywords: python, matplotlib, pylab, example, codex (see :ref:`how-to-search-examples`)