Thanks for the comment, it's a shame i did not know about BSXFUN!
It is true that the help of functions is not always meaningful.
I hope that you will find other functions interesting than fn_disp and fn_add...
I've inspected fn_disp and fn_add only.
While I see the advantage of fn_disp compare to disp when I read the code, the help section is meaningless.
fn_add can be made more efficient and powerful by using BSXFUN.