From: Bill Schottstaedt <bil@ccrma.Stanford.EDU>
Cc: guile-devel@gnu.org
Subject: Re: ratio implementation
Date: Tue, 29 Jul 2003 04:57:33 -0700 [thread overview]
Message-ID: <3F26612D.6090501@ccrma.stanford.edu> (raw)
In-Reply-To: <871xwakvv3.fsf@zip.com.au>
Kevin Ryde wrote:
>>I notice that r5rs seems to
>>imply that (inexact->exact .3) should return 3/10 (see the rationalize
>>example which is assuming this)
>>
>>
>
>Isn't that the effect of the rationalize function, rather than
>inexact->exact?
>
>
The example I was referring to was:
(rationalize
(inexact->exact .3) 1/10) ==> 1/3 ; exact
which only makes sense if (inexact->exact .3) does not
return 0, but 3/10. Then rationalize of that with an
error of 1/10 finds the simpler ratio 1/3. In Guile
currently (I'm typing from work, so I can't actually
check this...), the (inexact->exact .3) returns 0,
so rationalize would also return 0.
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next prev parent reply other threads:[~2003-07-29 11:57 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-07-28 11:24 ratio implementation Bill Schottstaedt
2003-07-28 12:08 ` Han-Wen Nienhuys
2003-07-29 0:41 ` Kevin Ryde
2003-07-29 11:57 ` Bill Schottstaedt [this message]
2003-07-30 22:42 ` Kevin Ryde
2003-09-15 10:35 ` Marius Vollmer
2003-09-15 16:19 ` Rob Browning
2003-09-15 22:06 ` Dirk Herrmann
2003-09-15 22:59 ` Kevin Ryde
2003-09-16 11:39 ` Bill Schottstaedt
2003-09-16 21:36 ` Rob Browning
2003-09-18 21:09 ` Dirk Herrmann
2003-10-07 15:26 ` Marius Vollmer
2003-10-13 10:58 ` Bill Schottstaedt
2003-10-14 8:57 ` Marius Vollmer
2004-02-18 14:25 ` fractions.test Bill Schottstaedt
2003-10-14 12:39 ` ratio implementation Marius Vollmer
2003-10-14 22:56 ` Kevin Ryde
2003-10-14 13:03 ` Marius Vollmer
2003-10-14 23:37 ` Kevin Ryde
2003-10-16 11:49 ` Bill Schottstaedt
2003-10-17 10:09 ` Marius Vollmer
2003-10-17 11:47 ` Bill Schottstaedt
2003-10-17 15:04 ` Rob Browning
2003-10-18 0:45 ` Kevin Ryde
2003-10-15 12:57 ` Bill Schottstaedt
2003-10-17 10:20 ` Marius Vollmer
2003-10-17 15:14 ` Rob Browning
2003-10-17 15:42 ` Marius Vollmer
2003-10-14 23:01 ` Kevin Ryde
2003-10-18 0:55 ` ash using shifts (was: ratio implementation) Kevin Ryde
2003-10-07 15:24 ` ratio implementation Marius Vollmer
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