NAN problem in loop
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hi guys ,I am try to solve numerical question.I try to finish my loop till when I get result less then error which I want(10^-12).Why I get NAN values.Thanks.
2 个评论
Are you sure your formula is correct? The terms diverge:
for n = 0:50
term(n+1) = ((((-1)^n)*(pi/3)^(2*n+1))/(2*n+1));
end
h = plot(term,'.-');
set(h,'MarkerSize',14)
It's an alternating series, so it could still converge, but will be slow. But I also looked at the sum of pairs of terms, and those look to diverge as well. (Admittedly, it has been long while since I have thought about series convergence.)
Where did you get the formula from?
emre arat
2021-5-5
回答（1 个）
DGM
2021-4-22
Let's see. By iteration #7694, you're calculating
(pi/3)^15389
Your result is going to end up infinite shortly. Once that happens, you end up trying to calculate
Inf - Inf
which is undefined, i.e. NaN.
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