Error of "Too many input arguements"

i would like to do optimization to the following. I would like to randomly generate two integers from the range -5.0 to 5.0 and then take square of the two integers separately and sum them up finally. The optimal solution for this function should be 0.0

function result=minsum()
x=randi([-5 5],1,2);
result=sum(x.^2);
end

I don't know if my codes are correct. When i tried to use the optimization tools it said "too many input arguements" I don't know how to solve the problem.

Answer 1

[Sean de Wolski]

If you want to optimize two numbers between -5 and 5, you shouldn't be using rand but instead letting the optimizer find them.

Here, I'll use random starting points but the optimizer will converge to 0,0

[xopt, fval] = fmincon(@(x)sum(x.^2),randi([-5 5],1,2),[],[],[],[],[-5 -5],[5 5])

[John D'Errico]

Just to add a clarifying point to a valid answer, the reason why Ellen gets an error of "too many input arguments" is that her function has NO input arguments.