why do I get this error while using find to determine the element in my list?

Hello dear friends.

I am encountring an error wile using the find command. could you please help.

kff is vector and my k flutter is equal to 0.3000.

when i enter 0.3000 directly to my find command it works but when i enter k_flutter it is not working.

thanks.

Answer 1

[KSSV]

You should not comapre floating point numbers like that.

Try:

tol = 10^-5 ;   % try changing the tolerance 
find(abs(kff-k_flutter)<tol) 

[KSSV]

Mehmet Salihi commented:

thank you for your fast help.

It solved my problem. could you please explain or give me another example to undertand the core function of the tolerance while using Find command.

[KSSV]

Read here: https://matlabgeeks.com/tips-tutorials/floating-point-comparisons-in-matlab/

[mehmet salihi]

thank you