How does this Runge-Kutta 4th Order code work?

The following is a line from a code that I was given representing the dynamics of a fish: [x,Added_Forces] = Runge_Kutta('Motion_Fish',ssize,x,Tail_Forces,Moments_Add,Delta_r)

[Jan]

Do you see that the code is not readable? Are you not interested in the readability of your question? I cannot reconsider, why so many question ignore the methods to format code .

Answer 1

[Jan]

Sorry for this trivial answer, but did you read this already:

doc feval

? It explaines this function exhaustively and I do not think that I can explain it better. But in short: It evaluates the first argument as a function.

As fas as I understand your explanations "for clarity" are correct. But my estimation has a limited power, because the code is hard to read and large.