Dear Jörg,
Try this:

> gsub("^.*['_']|[.].*$", "", "test_01.log")
[1] "01"

> as.numeric(gsub("^.*['_']|[.].*$", "", "test_01.log"))
[1] 1


HTH,

Jorge


On Fri, Jan 16, 2009 at 11:00 PM, Jörg Groß <joerg@licht-malerei.de> wrote:

> Hi,
>
> I have this variable;
>
>
> x <- c("test_01.log")
>
>
> and I want to extract the number (01) out of the variable.
> So that I get;
>
>  > x
> [1] 1
>
>
>
> I tried strsplit, but I don't know how to refer to the result.
>
> Can someone help me with that?
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>
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