Double sum of this formula

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giometar
giometar on 21 Jun 2019
Commented: giometar on 24 Jun 2019
Hello
I need help about this formula:
_{E_n}=\sum_{k=1}^{n}\left ( _{d_k} \sum_{l=0}^{1-k}_{K_l}*{sin^{2l}{b_n_-_1}}\right )
Values of K0 and b0 are known
Thanks

Accepted Answer

Shwetank Shrey
Shwetank Shrey on 21 Jun 2019
Just verify once if this is the formula that you needed. You would have to define K, b and n beforehand.
symsum((d(k).*symsum((K(l)*((sin(b(n-1))).^(2.*l))),l,0,(1-k))),k,1,n)
  3 Comments
Shwetank Shrey
Shwetank Shrey on 24 Jun 2019
Adjusted according to matlab indexing (1 indexed instead of 0 indexed).
d = randi([0 9], 10, 1);
K = randi([0 9], 10, 1);
b = randi([0 9], 10, 1);
n = 3;
sum_k = 0;
for k = 2 : n+1
sum_l = 0;
for l = 1 : 3-k % this was if you had 1-k which i guess is a typo. anyway add 2 to whatever this would otherwise be.
sum_l = sum_l + (K(l) .* (sin(b(n)).^(2.*l)));
end
sum_k = sum_k + (d(k) .* sum_l);
end
disp(sum_k);
giometar
giometar on 24 Jun 2019
thank you very much
it shoud be k-1

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