Traceback (most recent call last):
  File "/home/rpdock/mc/MC_DNA.py", line 771, in <module>
    fig.savefig("e_step.png", dpi = 500, format = 'png', transparent = False)
  File "/usr/local/lib/python2.7/dist-packages/matplotlib/figure.py", line 1814, in savefig
    self.canvas.print_figure(fname, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/matplotlib/backend_bases.py", line 2259, in print_figure
    **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/matplotlib/backends/backend_agg.py", line 507, in print_png
    FigureCanvasAgg.draw(self)
  File "/usr/local/lib/python2.7/dist-packages/matplotlib/backends/backend_agg.py", line 422, in draw
    self.renderer = self.get_renderer(cleared=True)
  File "/usr/local/lib/python2.7/dist-packages/matplotlib/backends/backend_agg.py", line 444, in get_renderer
    self.renderer = RendererAgg(w, h, self.figure.dpi)
  File "/usr/local/lib/python2.7/dist-packages/matplotlib/backends/backend_agg.py", line 92, in __init__
    self._renderer = _RendererAgg(int(width), int(height), dpi, debug=False)
MemoryError: In RendererAgg: Out of memory