[R] Regexp bug or misunderstanding

[Ista Zahn]

I think you want "[[:digit:]]" instead of "[:digit:]"

--Ista

On Mon, Jul 2, 2018 at 8:52 AM, Martin Møller Skarbiniks Pedersen
<traxplayer using 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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