[R] substring from behind

[Isidro Hidalgo]

It's possible the direct way in R:

customer <- c("Mercedes_02352", "Audi_03555")
substr(customer, nchar(customer) - 3, nchar(customer) - 1)

Isidro

> -----Mensaje original-----
> De: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org]
> En nombre de Jorge I Velez
> Enviado el: miércoles, 30 de enero de 2013 10:50
> Para: Mat
> CC: r-help at r-project.org
> Asunto: Re: [R] substring from behind
>
> Hi Mat,
>
> The following should get you started:
>
> > s <- "Mercedes_02352"
> > substr(s, nchar(s) - 3, nchar(s) - 1)
> [1] "235"
> >
>
> > # defining a function
> > foo <- function(x, a = 3, b = 1) substr(s, nchar(x) - a, nchar(x) -
> b)
> > foo(s)
> [1] "235"
>
> HTH,
> Jorge.-
>
>
> On Wed, Jan 30, 2013 at 8:05 PM, Mat <> wrote:
>
> > Hello together,
> >
> > i have a question for "substring".
> > I know i can filter a number like this one:
> > bill$No<-substring(bill$Customer,2,4)
> >
> > in this case i get the 2nd, 3rd and 4th number of my Customer ID.
> > But how can i do this, if i want the 2nd, 3rd and 4th number of a
> column.
> >
> > Like this one.
> > I have: Mercedes_02352
> > Audi_03555
> > and now i want to filter this data.frame to
> > 235
> > 355
> >
> > can you help me?
> >
> > Thanks.
> >
> > Mat
> >
> >
> >
> > --
> > View this message in context:
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> > Sent from the R help mailing list archive at Nabble.com.
> >
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> >
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