MATLAB programs referred to in the text:
  (``Introduction to Partial Differential Equations with MATLAB'',
   Author: Jeffrey Cooper (Birkhauser) (1998) 
   ISBN 0-8176-3967-5, 3-7643-3967-5)
    
Appendix E (p527 in the text) has a description of what these programs do,
and in particular which are programs and which are function files. 

Each Chapter subdirectory of the directory Mfiles also has a README file.
This is less detailed than Appendix E but lists what function files are
needed for each function.

According to the textbook preface, `codes.zip', which expands to the Mfiles
directory tree, is downloadable from either of

   www.Birkhauser.com/book/isbn/0-8176-3967-5   or
   www.math.umd.edu/~jec

The second URL leads to a Web page that describes the textbook author as a
Professor Emeritus at the University of Maryland, with Research Interests
``Partial Differential Equations of Hyperbolic Type''. Near the bottom of
this page is a link to a ``codes.zip'', which expands to approximately 77
Mfiles in 9 subdirectories named after Chapters.

The other URL is now redirected to the Springer-Verlag Web site.
Springer-Verlag has apparently acquired Birkhauser, who originally
published the textbook. With some effort one can find a downloadable file

   0817639675_Add_Resources.zip (269Kb)

that has the M-files and a variety of different files.

The directory Mfiles has
  (i) The MATLAB programs and functions from codes.zip, with chapters 2-9
    rewritten as chapters 02-09 for better directory listing, and
  (ii) The Images subdirectory from 08176...zip, which has apparent
    graphics output from several of the MATLAB programs. The image files
    were renamed to indicate chapters in text.