Taking a wild guess:
x = rand(1,4); % Create Vector
C = rand(4); % Create Matrix
for i = 1:4
for j = 1:4
E(i,j) = C(i,j)*x(i)*x(j); % Multiplications
end
end
S = sum(E(:)); % Summation
There are likely more efficient ways to do this, however I am choosing to keep this as transparent as possible. Note that symsum is not intended to do this type of summation.
