how to write objective function for 4 variables

Hi All i want to write a objective function for 4 variables and i want all 4 variables value in output, how to write it please help me.

Thank you.

[Yash]

post here the type of function and variables

Answer 1

[Walter Roberson]

function y = myObjective(x)
  first_variable = x(1);
  second_variable = x(2);
  third_variable = x(3);
  fourth_variable = x(4);
  ...
  y = ....
end

Then any of the optimization functions will report the vector of four values that optimized the objective.