[R] Lowest number in a numeric string

[Jim Lemon]

On 06/14/2012 06:08 PM, mogwai84 wrote:
> Hi all,
>
> I've got a very long numeric string. I want to find the lowest number that
> isn't in that string.
>
> E.G
>
> String = 123456
> Therefore 7 is the lowest number not in that string
>
> E.G.2
>
> String = 1234567891011
> Therefore 13 is the lowest number not in that string.
>
> Any thoughts? p.s. I'm an R noob.
>
Hi mogwai84,
Your second example is inconsistent with the first. If the answer is not 
12, then you must be counting the first two digits as a pair. However, 
that can't be right, because there are several other pairs that are much 
larger than 13. Are you making the assumption that all strings of digits 
contain monotonically increasing integers? Without a better 
specification of the problem, one can only guess at a solution.

Jim