delay error

i have voltage signal when i make it delay then subtract it from each other is suppose give zero but it give zero for some point and 7e-15 for other point and this make me problem coz i put output to switch to detected zero pass.

any one know how make it ignore 7e-15 value and make it feel like zero

Answer 1

[Wayne King]

You can always use a tolerance in your code.

tol = 1e-12; if (abs(x)< tol)

end

Or whatever you want the tolerance to be.

[mahmoud ibrahim]

which one relative or absolute tolerance ??