Problems with while loop
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Hi, I have a problem, I want the subtraction d1 to be less than 1 * 10 ^ -15 after several iterations, but the program stays busy.
2 Comments
James Tursa
on 31 Aug 2020
Please post your code as regular text and highlight it with the CODE button. We can't run pictures.
Accepted Answer
Bruno Luong
on 31 Aug 2020
Edited: Bruno Luong
on 31 Aug 2020
"Hi, I have a problem, I want the subtraction d1 to be less than 1 * 10 ^ -15 after several iterations, but the program stays busy."
Well you cannot demand floating point error to be that small.
Double IEEE has about 15 digits relative precision. You compare B1 to (y/k0) which is -7699432.66755457. The most you can demand is error is about
>> tol = eps(y/k0)
tol =
9.31322574615479e-10
So if you replace the break condition by
tol = eps(y/k0);
while tt>tol
...
end
your while loop will stop.
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