Re: Vector Projection .m file

[Daniel J Sebald]

On 06/12/2013 03:11 PM, Erickson, David wrote:
> Hello;
>
> Here is a vector projection .m file to compute the projection of x onto y.  As 
> it is derivative of your source code, it is returned to you under GPL 3.

Hi Dave,

I'm not sure what you have is derivative source code, so it probably 
isn't necessary to abide by the license.  What you've written only looks 
to the extent of utilizing the language.  If what you have written came 
from someone else's script file, then it should acknowledge the original 
author as well.

Also I'm not sure abiding by the license means sending a copy to the 
original author.  I think it falls more along the lines that if you 
distribute a derivative work you must make the changes you've done 
available.  For example, if I were to take the source code for project 
Foo and then write SuperFoo and distribute that, then I would need to 
post the modifications or indicate where the modifications can be gotten 
from.  That way anyone (not just the original author) has access.

As for the usefulness of a projection routine in the general sense, it 
probably falls in that category of perhaps not enough beyond basic 
linear algebra to warrant it.  I'll write separately with more specifics.

Dan