Index in position 2 exceeds array bounds (must not exceed 5).

function boiling_point
clc
         for i = 1:5
         u0 = [1; 1; 1; 1; 1; 1; 100];
         [u] = fsolve(@nl_eq, u0);
        fprintf(1,' %d tbp = %g C.\n',i, u(6+i));
         end
         
end
        function sol = nl_eq(u,i)
            sol = zeros(7);
            x = [0.1 0.2 0.2 0.2 0.2;
                0.2 0.1 0.2 0.2 0.2;
                0.2 0.2 0.1 0.2 0.2;
                0.2 0.2 0.2 0.1 0.2;
                0.2 0.2 0.2 0.2 0.1;
                0.1 0.1 0.1 0.1 0.1];
            A = [-3843 -4002 -4997 -5595 -6301 -7296];
            B = [8.358 7.833 8.665 8.847 9.261 10.078];
            Ci = 460;
                for i=1:6
                sol(i) = A(i)/(u(7)+Ci)+B(i)-log(u(i));
                end  
                sol(7) = sum(u(1:6).*x(:,i))-1;  
end

I know what does this error mean, but I can't understand what element is out of dimension. Appreciate any help!

Answer 1

[KALYAN ACHARJYA]

I sense to be here

fprintf(1,' %d tbp = %g C.\n',i, u(6+i));
%...................................^

Check?

>>whos u