You have to save your function myfun in separate file myfun.m
function [ f ] = myfun( x )
f = 3*x(1)^2 + 2*x(1)*x(2) + x(2)^2; % Cost function
end
And then execute commands:
x0 = [1,1];
[x,fval] = fminunc(@myfun,x0)
Or simpler (in one line without additional file):
[x,fval] = fminunc(@(x)3*x(1)^2 + 2*x(1)*x(2) + x(2)^2,[1 1]);
See also:
