Any Octave users? What is this code snippet actually doing?

[Bruce Labitt]

On 04/07/2013 11:22 AM, Joshua Judson Rosen wrote:
> Bruce Dawson <jbd at codemeta.com> writes:
>> Write a review of the book and indicate that the code therein has bugs!
>>
>> You're the eyeball + 1. Strengthen your power by reporting the bug in a
>> public forum! Help prevent others from falling into the same hole.
> <favorite>.
>
> Also, consider sending a picture of the page in question to this guy:
>
>      http://thankstextbooks.tumblr.com/
>
>
Funny website.  It really is amazing the junk that gets into textbooks.

\on topic

The book is authored by an expert in the field (for more than 20 
years).  The authors literally pioneered  Finite Difference Time Domain 
methods.  Is the book an easy read -- certainly not!

The code is a separate download(s) from the book.  There is some code 
published in the book, but it is limited to basic examples.

The code downloaded from the publisher (Artech House) doesn't exactly 
use the same variable naming convention as in the book, making it harder 
to follow.  I guess that is a valid criticism.

That being said, I did not, ahem, start from the beginning of the code 
examples.  Perhaps I should review them first, to see if the material 
was covered in the beginning examples.

Ducking back into the cave for more studying...