Holcombe:PythonDataAnalysis

SciPy includes matplotlib (ref) (Not necessary: after downloading SciPy I updated to the more recent version of matplotlib using matplotlib-0.98.5.2-py2.5-mpkg.zip for OSX, which installs in /Library/Python/2.5/site-packages/ and I needed to add that directory to my PYTHONPATH in my .profile file in my home directory)

See the HowTo and Cookbook, double-axis plotting

loadtxt returns recarray, like minispreadsheet explanation