I think you want "[[:digit:]]" instead of "[:digit:]"
--Ista
On Mon, Jul 2, 2018 at 8:52 AM, Martin Møller Skarbiniks Pedersen
<traxpla...@gmail.com> wrote:
> Hi,
>
> Have I found a bug in R? Or misunderstood something about grep() ?
>
> Case 1 gives the expected output
> Case 2 does not gives the expected output.
> I expected integer(0) also for this case.
>
> case 1:
> grep("[:digit:]", "**ABAAbabaabackabaloneaban")
> integer(0)
>
> case 2:
> grep("[:digit:]", "**ABAAbabaabackabaloneaband")
> [1] 1
>
> Regards
> Martin
>
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