Try this:
library(gsubfn)
strapply("There are 23 species", "[0-9]+", as.numeric)[[1]]
The gsubfn home pae is at:
http://gsubfn.googlecode.com
On Thu, Sep 18, 2008 at 4:51 AM, Paulo Cardoso <[EMAIL PROTECTED]> wrote:
> Hi,
>
> I'm not being able to capture a position of a 'string' in a character
> string.
>
> In this example: 'There are 20 species in this grid'
>
> I would like to capture the string (number) after 'are' and before
> 'species'. Consider they do not change. I wouldn't like to use substr
> because stop position may change.
>
> Thanks
>
> Paulo
>
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> and provide commented, minimal, self-contained, reproducible code.
>
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