Re: (atan 0 x) with gauche 0.9.14

Shiro Kawai <[email protected]> Wed, 17 Apr 2024 09:04:36 -1000

Newsgroups	gmane.lisp.scheme.gauche
Message-ID	<CALN0JNEz7zP=TF0EdYk7TvDR03DLwiVy88or=6HLFY77XhkJbQ@mail.gmail.com>

Good catch.  It looks like I thought exact zero needed to be returned for
exact zero.  I don't remember why.

On Wed, Apr 17, 2024 at 4:13 AM Jens Thiele <[email protected]> wrote:

> Hi,
>
> gosh> (gauche-version)
> "0.9.14"
> gosh> (radians->degrees (real-atan 0 -1))
> 180.0
> gosh> (radians->degrees (angle (make-rectangular -1 0)))
> 180.0
> gosh> (radians->degrees (atan 0.0 -1))
> 180.0
> ;; oops
> gosh> (radians->degrees (atan 0 -1))
> 0.0
>
> Greetings,
> Jens
>
>
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