INTRODUCTION:   matplotlib is a pure python 2D plotting library with a Matlab(TM)   syntax which produces publication quality figures using in a   variety of hardcopy formats (PNG, JPG, TIFF, PS) and interactive   GUI environments (WX, GTK) across platforms. matplotlib can be used   in python scripts, interactively from the python shell (ala matlab   or mathematica), in web application servers generating dynamic   charts, or embedded in GTK or WX applications; see backends.  matplotlib trys to make easy things easy and hard things  possible. You can generate plots, histograms, power spectra, bar  charts, errorcharts, scatterplots, etc, with just a few lines of  code. For example, to make a histogram of data in x, you simply need  to type  >>> hist(x, 100)   # use 100 bins    For the power user, you have full control of line styles, font  properties, axes properties, etc, via an object oriented interface  or via a handle graphics interface familiar to matlab users. A  summary of the goals of matplotlib and the progress so far can be  found athttp://matplotlib.sf.net/goals.html.REQUIREMENTS:   python 2.3+, and Numeric, numarray or numpy (recommended).  Other   requirements are backend dependent.  Seehttp://matplotlib.sourceforge.net/backends.html.  If you are using   python2.3, you'll also need to install setuptools; just downloadhttp://peak.telecommunity.com/dist/ez_setup.py and run it.INSTALL   The latest installation instructions can be found athttp://matplotlib.sourceforge.net/installing.html  and for backend specific install information seehttp://matplotlib.sourceforge.net/backends.html  If you want to use matplotlib interactively from the prompt, seehttp://matplotlib.sourceforge.net/interactive.htmlEXAMPLES  See the examples in the examples dir.  To see examples scripts with  the outputs they produce, seehttp://matplotlib.sourceforge.net/screenshots.htmlAUTHOR  John D. Hunter <jdhunter@ace.bsd.uchicago.edu>  Copyright (c) 2002-2004 John D. Hunter; All Rights Reserved.  Jeremy O'Donoghue wrote the wx backend  Seehttp://matplotlib.sourceforge.net/credits.html for additionaly  contributorsLICENSE  Based on that of python 2.2.  See the LICENSE file that ships with  the matplotlib source code orhttp://matplotlib.sourceforge.net/license.html