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The find function does not find the attribute element and outputs an empty row vector. What's the reason?

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sangjun han
sangjun han on 28 May 2021
Commented: Stephen on 28 May 2021
Here's my code.
for example,
V_bg=0.6:1/100:1.2;
output=find(V_bg==0.9);
i want to find value 0.9 but the ans is just 1x0 empty double row vector ?
i don't why

Accepted Answer

Asmit Singh
Asmit Singh on 28 May 2021
To find a noninteger value using the find function, it is recommended to use a tolerance value based on your data. Otherwise, the result is sometimes an empty matrix due to floating-point roundoff error. You can have look at the documentation for further details.
V_bg=0.6:1/100:1.2;
% change the tolerance level according to your liking
output=find(abs(V_bg-0.9)<0.001);

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