Matlab primer by Kermit Sigmon: PDF format (for Adobe Acrobat Reader) | Postscript format.
Online: Matlab resources from Indiana University, including Getting Started With MATLAB and Plotting with Matlab.
Online: A Practical Introduction To Matlab and a printable version in PS format
YAGTOM: Yet Another Guide To Matlab
There are several books on learning MATLAB, and MATLAB is also
incorporated into several numerical analysis textbooks. If you are
looking for a good book that will serve both as an introduction to and as a
reference for MATLAB, I recommend
Below are links to two different software packages that are largely (but not totally) the same as MATLAB. Both of these are free software that will run on a windows PC and on other platforms.