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Topic: Hold & Evaluate
Replies: 2   Last Post: Feb 25, 2013 2:19 AM

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 Jakub Serych Posts: 51 Registered: 1/27/08
Re: Hold & Evaluate
Posted: Feb 25, 2013 2:19 AM

Thanks to all, who have responded.

Jakub

> Dear mathgroup,
> I would like to generate sequence in the form:
>
> 1/1.2, 2/2.3, 3/3.4, 4/4.5, etc.
>
> It is very simple by a Table function:
>
> Table[n/(n + 0.1 (n + 1)), {n, 1, 15}]
>
> but as there are real numbers in denominators, Mathematica evaluates all and generates something like:
>
> {0.833333, 0.869565, 0.882353, 0.888889, 0.892857, 0.895522, etc.}
>
> How to evaluate numerators and denominators separately and print the
> sequen=
> ce in that "fraction like" form?
>
> I tested:
>
> #[[1]]/#[[2]] & /@ Table[{n, n + 0.1 (n + 1)}, {n, 1, 15}] and than used Hold[] and Evaluate[]:
>
> Hold[Evaluate[#[[1]]]/Evaluate[#[[2]]]] & /@ Table[{n, n + 0.1 (n + 1)},
> {n, 1, 15}]
>
> But it doesn't work as the Hold has "veto" power over any evaluation.
>
> Thanks in advance for any idea, how to do it
>
> Jakub

Date Subject Author
2/25/13 David Park
2/25/13 Jakub Serych