Hi,
you don't need to use global variables. You can use anonymous functions to do so. If this is the function to be optimized:
function y = myobjective(AB, C, X)
% AB is the variable to be optimized, e.g.,
A = AB(1:5);
B = AB(6:10);
y = ...; % compute y with AB, C, X ...
Then in your function where you start the optimization:
C = ...; % compute C
X = ...; % compute X
% now build the objective function handle: C and X are "stored"
% in fun, so when called by optimizer, C and X are passed
fun = @(x) myobjective(x, C, X);
% call optimizer
x = fmincon(fun, ...);
Hope this helps,
Titus
