From: "Neil Jerram" <neiljerram@googlemail.com>
To: "Anye Li" <li.anye.0@gmail.com>
Cc: bug-guile@gnu.org
Subject: Re: rationalize returns inexact results.
Date: Sun, 3 Aug 2008 00:24:12 +0100 [thread overview]
Message-ID: <49dd78620808021624y4c390749j56a571853e69ccdb@mail.gmail.com> (raw)
In-Reply-To: <488AB87A.8050701@gmail.com>
2008/7/26 Anye Li <li.anye.0@gmail.com>:
> Even if it is not a bug that rationalize returns inexact results (surprising
> and useless as they may be to me), I believe it is still a bug that (help
> rationalize) says "Return an exact number..." when in fact it does not.
Agreed. I'm just fixing this now, to make (help rationalize) say the
same as the Guile manual says:
Returns the @emph{simplest} rational number differing
from @var{x} by no more than @var{eps}.
As required by @acronym{R5RS}, @code{rationalize} only returns an
exact result when both its arguments are exact. Thus, you might need
to use @code{inexact->exact} on the arguments.
@lisp
(rationalize (inexact->exact 1.2) 1/100)
@result{} 6/5
Regards,
Neil
next prev parent reply other threads:[~2008-08-02 23:24 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-26 5:39 rationalize returns inexact results Anye Li
2008-08-02 23:24 ` Neil Jerram [this message]
-- strict thread matches above, loose matches on Subject: below --
2008-07-25 17:33 Bill Schottstaedt
2008-07-24 5:15 Anye Li
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