fig = figure()
ax = fig.gca()
th = np.linspace(0,2 * np.pi, 3000)
th_al = np.linspace(0,2 * np.pi, 20)

ax.plot(th, sin(20 * th), label='signal')
ax.plot(th_al, sin(20 * th_al), label='aliased', marker='o')
ax.legend()


fig.savefig('test.eps')

/home/tcaswell/local_installs/lib/python2.7/site-packages/matplotlib/figure.pyc in savefig(self, *args, **kwargs)
   1361             kwargs.setdefault('edgecolor', rcParams['savefig.edgecolor'])
   1362 
-> 1363         self.canvas.print_figure(*args, **kwargs)
   1364 
   1365         if transparent:

/home/tcaswell/local_installs/lib/python2.7/site-packages/matplotlib/backends/backend_qt4agg.pyc in print_figure(self, *args, **kwargs)
    159 
    160     def print_figure(self, *args, **kwargs):
--> 161         FigureCanvasAgg.print_figure(self, *args, **kwargs)
    162         self.draw()

/home/tcaswell/local_installs/lib/python2.7/site-packages/matplotlib/backend_bases.pyc in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
   2130                 orientation=orientation,
   2131                 bbox_inches_restore=_bbox_inches_restore,
-> 2132                 **kwargs)
   2133         finally:
   2134             if bbox_inches and restore_bbox:

/home/tcaswell/local_installs/lib/python2.7/site-packages/matplotlib/backend_bases.pyc in print_eps(self, *args, **kwargs)
   1874         from backends.backend_ps import FigureCanvasPS  # lazy import
   1875         ps = self.switch_backends(FigureCanvasPS)
-> 1876         return ps.print_eps(*args, **kwargs)
   1877 
   1878     def print_pdf(self, *args, **kwargs):

/home/tcaswell/local_installs/lib/python2.7/site-packages/matplotlib/backends/backend_ps.pyc in print_eps(self, outfile, *args, **kwargs)
    972 
    973     def print_eps(self, outfile, *args, **kwargs):
--> 974         return self._print_ps(outfile, 'eps', *args, **kwargs)
    975 
    976 

/home/tcaswell/local_installs/lib/python2.7/site-packages/matplotlib/backends/backend_ps.pyc in _print_ps(self, outfile, format, *args, **kwargs)
   1005             self._print_figure(outfile, format, imagedpi, facecolor, edgecolor,
   1006                                orientation, isLandscape, papertype,
-> 1007                                **kwargs)
   1008 
   1009     def _print_figure(self, outfile, format, dpi=72, facecolor='w', edgecolor='w',

/home/tcaswell/local_installs/lib/python2.7/site-packages/matplotlib/backends/backend_ps.pyc in _print_figure(self, outfile, format, dpi, facecolor, edgecolor, orientation, isLandscape, papertype, **kwargs)
   1098             bbox_inches_restore=_bbox_inches_restore)
   1099 
-> 1100         self.figure.draw(renderer)
   1101 
   1102         if dryrun: # return immediately if dryrun (tightbbox=True)

/home/tcaswell/local_installs/lib/python2.7/site-packages/matplotlib/artist.pyc in draw_wrapper(artist, renderer, *args, **kwargs)
     52     def draw_wrapper(artist, renderer, *args, **kwargs):
     53         before(artist, renderer)
---> 54         draw(artist, renderer, *args, **kwargs)
     55         after(artist, renderer)
     56 

/home/tcaswell/local_installs/lib/python2.7/site-packages/matplotlib/figure.pyc in draw(self, renderer)
    997         dsu.sort(key=itemgetter(0))
    998         for zorder, a, func, args in dsu:
--> 999             func(*args)
   1000 
   1001         renderer.close_group('figure')

/home/tcaswell/local_installs/lib/python2.7/site-packages/matplotlib/artist.pyc in draw_wrapper(artist, renderer, *args, **kwargs)
     52     def draw_wrapper(artist, renderer, *args, **kwargs):
     53         before(artist, renderer)
---> 54         draw(artist, renderer, *args, **kwargs)
     55         after(artist, renderer)
     56 

/home/tcaswell/local_installs/lib/python2.7/site-packages/matplotlib/axes.pyc in draw(self, renderer, inframe)
   2068 
   2069         for zorder, a in dsu:
-> 2070             a.draw(renderer)
   2071 
   2072         renderer.close_group('axes')

/home/tcaswell/local_installs/lib/python2.7/site-packages/matplotlib/artist.pyc in draw_wrapper(artist, renderer, *args, **kwargs)
     52     def draw_wrapper(artist, renderer, *args, **kwargs):
     53         before(artist, renderer)
---> 54         draw(artist, renderer, *args, **kwargs)
     55         after(artist, renderer)
     56 

/home/tcaswell/local_installs/lib/python2.7/site-packages/matplotlib/lines.pyc in draw(self, renderer)
    579                 renderer.draw_markers(
    580                     gc, marker_path, marker_trans, subsampled, affine.frozen(),
--> 581                     rgbaFace)
    582                 alt_marker_path = marker.get_alt_path()
    583                 if alt_marker_path:

/home/tcaswell/local_installs/lib/python2.7/site-packages/matplotlib/backends/backend_ps.pyc in draw_markers(self, gc, marker_path, marker_trans, path, trans, rgbFace)
    588                 ps_color = '%1.3f setgray' % rgbFace[0]
    589             else:
--> 590                 ps_color = '%1.3f %1.3f %1.3f setrgbcolor' % rgbFace
    591 
    592         # construct the generic marker command:

TypeError: not all arguments converted during string formatting