From: Florent Monnier <fmonnier@linux-nantes.fr.eu.org>
To: caml-list@yquem.inria.fr
Cc: Sean McLaughlin <seanmcl@cmu.edu>
Subject: Re: [Caml-list] float rounding
Date: Sun, 1 Oct 2006 14:44:33 +0200 [thread overview]
Message-ID: <200610011444.33789.fmonnier@linux-nantes.fr.eu.org> (raw)
In-Reply-To: <89957A27-4B6A-4FCF-A425-1468ECFA8B62@cmu.edu>
> I'm using Ocaml for an interval arithmetic application. I"m
> curious about
> what the Ocaml parser/compiler does to float constants. May I assume
> that for any constant I enter, eg. 3.1415... (for N digits of pi), that
> the compiler will give me a closest machine representable number?
> i.e., if I bound a constant by the previous and next floating point
> value to
> that given me by the compiler,
> will it always be the case that my original (mathematical) constant
> lies in that interval?
For the concrete exemple of PI, perhaps you could use a mathematical
calculation to get its best value:
# 4. *. atan 1. ;;
- : float = 3.14159265358979312
(but the last number '2' is wrong)
For other constants, maybe there are equivalent things?
next prev parent reply other threads:[~2006-10-01 12:41 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-30 18:25 Sean McLaughlin
2006-10-01 12:44 ` Florent Monnier [this message]
2006-10-01 13:36 ` [Caml-list] " Gerd Stolpmann
2006-10-01 16:36 ` Xavier Leroy
2006-11-23 23:00 ` David Monniaux
2006-10-03 13:41 ` Christophe Raffalli
2006-10-03 19:59 ` Christophe Raffalli
2006-10-03 21:05 ` Olivier Andrieu
2006-11-26 1:51 ` David Monniaux
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