delay error

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mahmoud ibrahim
mahmoud ibrahim 2011-12-20
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

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回答（1 个）

Wayne King
Wayne King 2011-12-20
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.
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mahmoud ibrahim
mahmoud ibrahim 2011-12-20
which one relative or absolute tolerance ??

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