Double sum of a product

Can anyone help me with this? I've just started to use Matlab and i don't know how to do it. Thanks in advance!

Answer 1

[Stephan]

Hi,

Use a nested for-loop for this. Outer loop counts up from i=1 to N and the inner loop from n=1 to N.

for n = 1:N
    for k = 1:N
        r_0 = sum(rho_kn * r_k0 * r_n0);
    end
end
r_0 = sqrt(r_0);

Note:

I replaced "i" by "k" here, because you could get in trouble when using i for loop count in combination with complex numbers. So i isnt recommended to use as a variable in matlab code.

Best regards

Stephan

[Elia Guerra]

Thanks for your help!

[Stephan]

with pleasure

Best regards

Stephan

[James Tursa]

This can't possibly work correctly. r_0 is replaced with each iteration instead of accumulating. The indexes n and k are not used inside the loops for anything. Etc.

Have you actually tried to use this "solution"?