In which format I have to give the inputs?

Hi,

I want to optimize heat exchanger design parameters I am creating an objective function for that. a = temp parameters, b = pressure parameters, c= cost variation

I have the code as function a = objfun(a,b,c)

my output will be a(1) b(1) c(1) a(2) b(2) c(2) a(3) b(3) c(3) . . . . . . . . . . . . . . .

In which format I have to give the inputs?

[Rik]

What the input should be like, depends on what your function is actually doing.

Have a read here (or here for more general advice) and here. It will greatly improve your chances of getting an answer.

Answer 1

[Walter Roberson]

Example:

abc0 = randi(10, 3, 4);
bestabc = fmincon(@objfun, abc0(:));

function cost = objfun(abc)
  abc = reshape(abc, [], 3);
  a = abc(:,1);
  b = abc(:,2);
  c = abc(:,3);

    cost = ....

That is, you can create an array of initial values for your purpose, but you will need to reshape it as a vector to pass in to the optimization. However, in your objective function you can reshape as an array again and then extract appropriate parts of it.