On an iMac running 10.6.3, python 2.6.4 I have installed numpy and then 
matplotlib using 'pip'.
The message in both cases was that the install was successful.

'import matplotlib' does not cause error messages.
'from pylab import randn, hist' gets a traceback with the message "ImportError: 
No module named ma"

How do I get  matplotlib to work?

Thank you for any help.

Christopher

------
>>> from pylab import randn, hist
/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/__init__.py:62:
 DeprecationWarning: the md5 module is deprecated; use hashlib instead
  import md5, os, re, shutil, sys, warnings
/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/pytz/tzinfo.py:5:
 DeprecationWarning: the sets module is deprecated
  from sets import Set
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File 
"/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/pylab.py",
 line 1, in <module>
    from matplotlib.pylab import *
  File 
"/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/pylab.py",
 line 206, in <module>
    from matplotlib.numerix import npyma as ma
  File 
"/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/numerix/__init__.py",
 line 166, in <module>
    __import__('ma', g, l)
  File 
"/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/numerix/ma/__init__.py",
 line 16, in <module>
    from numpy.core.ma import *
ImportError: No module named ma
------
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