Message-ID: <CAHqSRuQ7QkkF7SXwT+JduAUq4y-Sj2NYJTqX7QJZagXy64iqKA@mail.gmail.com>
Date: 2020-10-22T19:24:25Z
From: Bill Dunlap
Subject: Function of "matrix"
In-Reply-To: <CAEN3HwdHfbZzyTA6tWF5Br1nn_-i7Z73zjH7xacv=ep=wZBP0A@mail.gmail.com>
> 10.1/0.1 was successfully calculated
Note that 'computed as' is not the same as 'printed as'. Computations
are
done with 52 binary digits of precision and printing is, by default, done
with
7 decimal digits of precision. See FAQ 7.31.
> 101 - 10.1/0.1
[1] 1.421085e-14
> options(digits=17)
> 10.1/0.1
[1] 100.99999999999999
> trunc(10.1/0.1)
[1] 100
On Thu, Oct 22, 2020 at 11:42 AM ?????? <jaajikan at gmail.com> wrote:
> Dear R project team
>
> I used the function of "matrix" as follows:
> matrix(c(1:3030), 10.1/0.1)
> However, in the function, matrix, 10.1/0.1 was regarded as 100 not as 101.
> Therefore, a warning message appeared.
> On the other hand, matrix(c(1:3030), 101) or matrix(c(1:3030), 10.1*10) was
> OK. Of course, simply, 10.1/0.1 was successfully calculated. However,
> In the "matrix" environment, 10.1/0.1 was calculated as 100.
>
> Would you give me some answers?
>
> Sincerely
>
> Kazuki Sakura
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
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> and provide commented, minimal, self-contained, reproducible code.
>
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