First thing. This:
fminsearch(FullScore,[15 0.5])
calls the function FullScore with no inputs; that's why you get that error. You need to send the function handle @FullScore instead:
fminsearch(@FullScore,[15 0.5])
Then you'll get a different error, due to the fact that fminsearch takes functions of one input only. You can get around that by either (1) redefining your function FullScore to take a single input:
function out = FullScore(P1P2)
P1 = P1P2(1);
P2 = P1P2(2);
% ... your code
end
Or (2) make an anonymous function that takes a single 1-by-2 input and sends two scalar inputs to FullScore, and call fminsearch on that anonymous function:
f = @(pp)FullScore(pp(1),pp(2));
fminsearch(f,[15 0.5])
(or, same as above, but without storing the anonymous function as the variable f:)
fminsearch(@(pp)FullScore(pp(1),pp(2)),[15 0.5])
With the second approach you don't have to change the definition of FullScore.
