[R] Extracting part of alpha numeric string

[Abhinaba Roy]

Hey,

worked like a charm! :)

Could you please explain about

sub("^([0-9]*).*$", "\\1", fields)

Thanks,
Abhinaba

On Mon, Nov 30, 2015 at 4:47 PM, <phgrosjean at sciviews.org> wrote:

> fields <- c("2154333b-3208-4519-8b76-acaef5b5a479",
> "980958a0-103b-4ba9-afaf-27b2f5c24e69",
>             "00966654-0dea-4899-b8cf-26e8300b262d")
> sub("^([0-9]*).*$", "\\1", fields)
>
> Best,
>
> Philippe Grosjean
>
> > On 30 Nov 2015, at 11:39, Abhinaba Roy <abhinabaroy09 at gmail.com> wrote:
> >
> > Hi,
> >
> > I have a field with alpha numeric codes like,
> >
> > 2154333b-3208-4519-8b76-acaef5b5a479 980958a0-103b-4ba9-afaf-27b2f5c24e69
> > 00966654-0dea-4899-b8cf-26e8300b262d
> > I want a derived field which will contain ONLY the numeric part before
> the
> > first alphabet and the first '-',
> >
> > for example the derived field from the sample above will give me
> >
> > 2154333
> > 980958
> > 00966654
> >
> > How can this be achieved in R?
> >
> > P.S. I do not have much knowledge on regex. It would be of great help if
> > you could suggest some reading for beginners.
> >
> > Thanks,
> > Abhinaba
> >
> >       [[alternative HTML version deleted]]
> >
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>
>

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