MATLAB: How to solve an equation from 2 different matrix..

loopsmathematicsmatrixvectorization

I have a problem when i want to vectorize an equation, and the elements of the equation contain 2 different matrix with 2 different size. for example :
      P   Q   R   S   T
A = [ 1   3   21  5   20
      2   1   15  1   25
      3   5   7   3   21
      4   2   6   6   28
      5   4   5   7   16
      6   2   8   10  18
      7   3   12  9   12
      8   1   7   4   23];
      P   P    W
     (i) (j)
B = [ 1   2   0.5
      1   8   0.8
      2   1   0.6
      3   4   0.22
      3   7   0.13
      4   5   0.16
      4   6   0.58
      5   6   0.21
      6   7   0.20
      7   8   0.66];
and the equation is :
I've already try with this :
n = length(A(:,1));
for i = 1:n
for j = 1:i
 x = sum((w*(Q(i)-R(j))*(Q(j)-R(i)))/S(i)-T(j));
end
end
but the result is "Index exceeds matrix dimensions." Does anyone have the solution…??
thanks..

Best Answer

The code for the posted equation:
x = 0;
n = size(A, 1);
for i = 1:n
  for j = 1:n
    x = x + sum((w*(Q(i)-R(j))*(Q(j)-R(i)))/S(i)-T(j));
  end
end
But this does not change anything for the "Index exceeds matrix dimensions" problem. Please post the complete error message and finc out which of the array fails:
dbstop if error
% Then run the program until the error occurres
disp(i)
disp(j)
disp(size(Q))
disp(size(R))
disp(size(S))
disp(size(T))
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