Why do I get Index exceeds the number of array elements (1).

Hello, this is my function

fun = @(x)100*(x(2)-x(1)^2)^2 + (1-x(1))^2;

x0 = 0.5;

A = [1;2];

b = [1;2];

[x,fval] = fmincon(fun,x0,A,b,[],[],[],[],[]);

when I try to run it I get an error, but i dont understand why

Answer 1

[bharath pro]

The error is caused because x0 is scaler but the function fun needs a vector ( x(1) and x(2) ). The following code works fine after I changed the dimensions of X0, A and B.

fun = @(x)100*(x(2)-x(1)^2)^2 + (1-x(1))^2;
x0 = [0.5,0.6];
A = [1,2];
b = 1;
[x,fval] = fmincon(fun,x0,A,b,[],[],[],[],[]);