require(MASS)
?as.fractions
as.fractions(1/2+1/8)

-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22"
O<http://maps.google.com/maps?f=q&hl=en&q=Curitiba,+Brazil&layer=&ie=UTF8&z=18&ll=-25.448315,-49.276916&spn=0.002054,0.005407&t=k&om=1>

On 25/06/07, Federico Calboli <f.calboli@imperial.ac.uk> wrote:
>
> Hi All,
>
> is there a function in R that allows me to work with fractions without
> transforming them to floats (or whatever) in between?
>
> Something that would calculate something like:
>
> (1/2 + 1/8) * 1/2 = 5/16
>
> without ever transforming to 0.5 and 0.125?
>
> Best,
>
> Federico
>
> --
> Federico C. F. Calboli
> Department of Epidemiology and Public Health
> Imperial College, St Mary's Campus
> Norfolk Place, London W2 1PG
>
> Tel  +44 (0)20 7594 1602     Fax (+44) 020 7594 3193
>
> f.calboli [.a.t] imperial.ac.uk
> f.calboli [.a.t] gmail.com
>
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> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

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