This seems like a good start. To be honest, I knew nothing about these equations before I saw this submission. So I did a little reading on the internet. I might suggest the author provide some additional links for the student. Here are a few that might be of interest.
As for the help, I was pleasantly surprised when I downloaded this. I found very readable help. I found an error check, but only one. I found the differential equations written out.
There were a couple of flaws. There is no H1 line, so next year when you try to find this m-file, you will have no way to do so. An H1 line allows the function lookfor to work, by providing a descriptive line filled with key words. It is that very FIRST line of comments that lookfor uses.
Next, the three arguments are overwritten in the beginning of the code. So it does not matter what values were provided, this code ALWAYS uses those same values.
The problems in this code are easily fixed. I'll hope that the author does so, and also adds in some good references, plus perhaps some more explanation of what these equations are used for. When that happens, I'll be happy to raise my rating.
