Re: [R] regexpr mystery can not remove trailing spaces

From: Matt Shotwell <shotwelm_at_musc.edu>
Date: Wed, 02 Jun 2010 09:56:53 -0400

On Wed, 2010-06-02 at 09:22 -0400, Petr PIKAL wrote:
> Hi
>
> > dput(bbb)
> c("02.06.10 12:40 ", "02.06.10 12:00 ", "02.06.10 11:00 ",
> "02.06.10 10:00 ", "02.06.10 09:00 ", "02.06.10 08:00 ",
> "02.06.10 07:00 ", "02.06.10 06:00 ", "02.06.10 05:00 ",
> "02.06.10 04:00 ", "02.06.10 03:00 ", "02.06.10 02:00 ",
> "02.06.10 01:00 ", "02.06.10 00:00 ", "01.06.10 23:00 ",
> "01.06.10 22:00 ", "01.06.10 21:00 ", "01.06.10 20:00 ",
> "01.06.10 19:00 ", "01.06.10 18:00 ", "01.06.10 17:00 ",
> "01.06.10 16:00 ", "01.06.10 15:00 ", "01.06.10 14:00 ",
> "01.06.10 13:00 ", "01.06.10 05:00 ", "31.05.10 05:00 ",
> "30.05.10 05:00 ", "29.05.10 05:00 ", "28.05.10 05:00 ",
> "27.05.10 05:00 ")
> >
>
> For simplicity I change the name and put it to single variable.
> I also reinstalled R to recent R-devel
>
> > sub('\\w+$', '', bbb[1])

my first message had a typo, should have been with '\\s' rather than '\ \w'.

sub('\\s+$', '', bbb[1])

> [1] "02.06.10 12:40 "
> > sub('[:space:]', '', bbb[1])

this should be

sub('[[:space:]]+$', '', bbb[1])

that's why it stripped the ':' and not white space

> [1] "02.06.10 1240 "
> >
>
> I also tried Matt's suggestion but it did not help.
>
> Regards
> Petr
>
> Joris Meys <jorismeys_at_gmail.com> napsal dne 02.06.2010 14:35:19:
>
> > Could you provide us with dput(becva$V1[1])?
> > Cheers
> > Joris
>
> > On Wed, Jun 2, 2010 at 2:07 PM, Petr PIKAL <petr.pikal_at_precheza.cz>
> wrote:
> > Dear all
> >
> > I encountered strange problem with regexpr replacement
> >
> > I made this character object
> >
> > str <- "02.06.10 12:40 "
> >
> > > str(str)
> > chr "02.06.10 12:40 "
> >
> > I read in an object which seems to be quite similar
> >
> > > str(as.character(becva$V1)[1])
> > chr "02.06.10 12:40 "
> >
> > However I can not remove trailing spaces from it
> >
> > > sub(' +$', '', as.character(becva$V1[1]))
> >
> > [1] "02.06.10 12:40 "
> > > sub(' +$', '', str)
> > [1] "02.06.10 12:40"
> > >
> >
> > Do somebody have an idea what to do?
> >
> > $version.string
> > [1] "R version 2.12.0 Under development (unstable) (2010-04-25 r51820)"
> >
> > on Windows
> >
> > Regards
> > Petr
> >
> > ______________________________________________
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> >
> >
> >
> > --
> > Joris Meys
> > Statistical Consultant
> >
> > Ghent University
> > Faculty of Bioscience Engineering
> > Department of Applied mathematics, biometrics and process control
> >
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> >
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> > Joris.Meys_at_Ugent.be
> > -------------------------------
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>
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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Wed 02 Jun 2010 - 14:08:53 GMT

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