From help-request at octave dot org Thu Jan  5 05:47:44 2006
Subject: Re: rational numbers only
From: Geraint Paul Bevan <g dot bevan at eng dot gla dot ac dot uk>
To: Jorge Barros de Abreu <ficmatin01 at solar dot com dot br>
CC: help at octave dot org
Date: Thu, 05 Jan 2006 11:43:19 +0000

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Jorge Barros de Abreu wrote:

> ans = 3.5000
> 
> but i will like that the answer was:
> 
> ans = 7/2
> 
> the desired answer is 7/2, not 3.5.

The 'rat' command will find a rational approximation to a number:

octave> [n,d] = rat(1+0.5+1/3+5/3); [num2str(n), '/', num2str(d)]
ans = 7/2

- --
Geraint Bevan
http://www.mech.gla.ac.uk
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