My problem is that the units are wonky on my colorbar.  I input them in my transfer function as cgs, and the peaks seem to be in the right place based on my input range and sample values.  Can I get the colorbar to present the density values in cgs?  You can see the output and the code attached. 

Oh, I had to add in the line
matplotlib.use('pdf')
because I was getting a _tkinter can't find your screen error everytime I tried to add the colorbar.  I think it was a matplotlib with my computer problem.

Thanks!