Re: Float numbers equality.

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Subject: Re: Float numbers equality.
From: Egor Skriptunoff <egor.skriptunoff@...>
Date: 2013年8月10日 10:56:22 +0300

On Sat, Aug 10, 2013 at 1:18 AM, Luiz Henrique de Figueiredo <lhf@tecgraf.puc-rio.br> wrote:

> function float_equal(lhs, rhs, epsilon)
> return math.abs(lhs - rhs) < epsilon
> end

As mentioned before, if you have to do this, you need to use *relative* error,
not absolute error:
return math.abs(lhs - rhs) < epsilon*rhs

Two zeros will never be equal to each other :-(

References:
- Float numbers equality., Karol Dro
- Re: Float numbers equality., Matthias Kluwe
- Re: Float numbers equality., Coda Highland
- Re: Float numbers equality., Luiz Henrique de Figueiredo

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