Re: rational numbers only

[David Bateman]

Jorge Barros de Abreu wrote:

> Hi.
>
> ?????Which the variable name that force maxima to work with ratonal 
> numbers
> only???
> For example, when in octave is inserted:
>
> 1+0.5+1/3+5/3
>
> the answer is:
>
> ans = 3.5000
>
> but i will like that the answer was:
>
> ans = 7/2
>
> the desired answer is 7/2, not 3.5.
>
> Is it possible ou alread implemented??
>
> Thanks
Possible solutions

[n,d] = rat(1+0.5+1/3+5/3); str = sprintf("%d/%d",n,d)

or more concisely

str = rats(1+0.5+1/3+5/3)

If there is trouble with precision that can be written as

symbols; str = rats(to_double(vpa(1) +vpa(0.5)+vpa(1)/vpa(3)+vpa(5)/vpa(3)))

Cheers
David


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