General expression for inputting n number of arguments

Hi

This is just an example of what I am basically asking..

I have an objective function eg., f=@(a,b,c,d) a+2*b+3*c+d;

with those unknown variables [a,b,c,d]

I created an array of random numbers eg., A = [1 5 3 2];

and now I calculate my objective value eg., f_obj=abs(f(A(1),A(2),A(3),A(4));

and this gives me a numerical output.

Now my question is, how do I code f_obj to receive any number of arguments? Say, I have 3 unknowns, or 5 unknowns. The objective function is random so I don't want to have to keep updating my code if this changes. Is there a way to code a general expression? Ive seen that 'varargin' is used but I'm not sure if this is the correct solution.

Thank you

Answer 1

[Walter Roberson]

function r = call_f(f)
  n = abs(nargin(f));
  A = num2cell( rand(1,n) );
  r = f(A{:});