============
Introduction
============

Welcome to the Python-Control project.

The python-control package is a set of python classes and functions
that implement common operations for the analysis and design of
feedback control systems.  The initial goal is to implement all of the
functionality required to work through the examples in the textbook
Feedback Systems by Astrom and Murray. A MATLAB compatibility package
(control.matlab) is available that provides many of the common
functions corresponding to commands available in the MATLAB Control
Systems Toolbox.

In addition to the documentation here, there is a project wiki that
contains some additional information about how to use the package
(including some detailed worked examples):

  http://python-control.sourceforge.net

Some Differences from MATLAB
----------------------------
The python-control package makes use of NumPy and SciPy.  A list of
general differences between NumPy and MATLAB can be found here:

  http://www.scipy.org/NumPy_for_Matlab_Users

In terms of the python-control package more specifically, here are
some thing to keep in mind:

* You must include commas in vectors.  So [1 2 3] must be [1, 2, 3].
* Functions that return multiple arguments use tuples
* Can't use braces for collections; use tuples instead
* Transfer functions are only implemented for SISO systems (due to
  limitations in the underlying signals.lti class); use state space
  representations for MIMO systems.

Getting Started
---------------
1. Download latest release from http://sf.net/projects/python-control/files.
2. Untar the source code in a temporary directory and run 'python setup.py
   install' to build and install the code
3. To see if things are working correctly, run ipython -pylab and run the 
   script 'examples/secord-matlab.py'.  This should generate a set response,
   Bode plot and Nyquist plot for a simple second order system.
4. To see the commands that are available, run the following commands in
   ipython::
       >>> import control
       >>> ?control.matlab
5. If you want to have a MATLAB-like environment for running the control
   toolbox, use::
       >>> from control.matlab import *