Nested loops for double summation

Answer 1

[Akira Agata]

How about the following?

% Example of 3-by-3 array n
n = rand(3);

% Calculate R, C, and T
R = sum(n,2);
C = sum(n);
T = sum(R);

% Calculate \chi^2
CR = (C'*R')';
S = ((n - CR/T).^2)./(CR/T);

chi2 = sum(S(:));

[J.Cam]

Yes, thank you it worked out!