[Matplotlib-users] numpy and matplotlib usage

Hi,

I'm using matplotlib w/numerix set to numpy (as described in my prior  
post).

What I am wondering is in what situations one would want to:

import pylab
import numpy

together, because there is matlab-style stuff (e.g. matrices, arrays,  
cumprod, fft, arange etc.) by importing the pylab package alone.

On a related note, in trying to get a better idea of how math vs.  
plot functionality is handled in matplotlib, I looked at mlab.py and  
pylab.py; it doesn't seem there is a clear separation of these  
functions, but perhaps I'm missing something?

Thanks!

--b