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From: Ray Andrews <rayandrews@eastlink.ca>
To: zsh-users@zsh.org
Subject: Re: arithmetic anomaly
Date: Thu, 25 Mar 2021 16:57:52 -0700	[thread overview]
Message-ID: <8464f5c6-7455-d055-c5eb-f4942b7fcb20@eastlink.ca> (raw)
In-Reply-To: <CAN=4vMokvyhoRiF+y=YJg=fBzmwKj3kj0StKJCN+B_yLeg5fAw@mail.gmail.com>

On 2021-03-25 3:54 p.m., Roman Perepelitsa wrote:
> On Thu, Mar 25, 2021 at 11:44 PM Ray Andrews <rayandrews@eastlink.ca 
> <mailto:rayandrews@eastlink.ca>> wrote:
>
>     On 2021-03-25 1:40 p.m., Lawrence Velázquez wrote:
>     >
>     > The bad news is that *all* your figures -- your numerators, Brett's
>     > numerators, and the denominators -- are actually incorrect for
>     > level=15 and higher.
>     Sheesh, what gives?  Seems no accuracy beyond 15 digits?
>
>
> Indeed. 64-bit floating point numbers usually have 15.95 decimal 
> digits of precision. Depending on the compiler and how you write your 
> code, you might get higher precision but in practice many projects 
> turn this off because having borderline non-deterministic results of 
> computation sucks.

That's for sure.  I'd rather the result was truncated.  Why show 
garbage?  Nuts, why compute garbage?




  reply	other threads:[~2021-03-25 23:58 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-25 15:52 Ray Andrews
2021-03-25 20:40 ` Lawrence Velázquez
2021-03-25 22:44   ` Ray Andrews
2021-03-25 22:54     ` Roman Perepelitsa
2021-03-25 23:57       ` Ray Andrews [this message]
2021-03-26  0:16 ` Oliver Kiddle
2021-03-26  0:37   ` Ray Andrews
2021-03-26 10:35     ` Roman Perepelitsa
2021-03-26 14:36       ` Ray Andrews
2021-03-26 14:49         ` Roman Perepelitsa
2021-03-26 15:35           ` Ray Andrews
2021-03-26 17:09             ` Lawrence Velázquez
2021-03-26 21:45               ` Ray Andrews
2021-03-26 21:59                 ` Lawrence Velázquez

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