http://www.mathworks.com/
  http://spicerack.sr.unh.edu/~mathadm/tutorial/software/matlab/
  http://users.ece.gatech.edu/~bonnie/book/TUTORIAL/tutorial.html
  http://www.math.utah.edu/lab/ms/matlab/matlab.html
 http://www.dspguru.com/
  http://www.engin.umich.edu/group/ctm/basic/basic.html
  http://www.thebeehive.org/external_link.asp?r=/school/high/subjects.asp?subject=35&e=http://www.sosmath.com/matrix/matrix.html