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Do you know the definition of the Euclidean distance?
G = rand(1, 72); G2 = rand(1, 72); D = sqrt(sum((G - G2) .^ 2));
A more efficient method, but this matters only for much larger vectors:
V = G - G2; D = sqrt(V * V');
Or a Matlab command:
D = norm(G - G2);
A good ide is to search in the documentation before asking in MATLAB Answers: