Maybe:

 gsub("\\.(\\d{1}\\s)", ".0\\1", x)


On Tue, Nov 9, 2010 at 3:43 PM, Dimitri Liakhovitski <
dimitri.liakhovitski@gmail.com> wrote:

> Thanks a lot, Henrique,
> but I realised, my strings look a bit more complicated, like this:
> x<-c("starts 2000.1 some words","starts 2001.2 different
> words","starts 2008.10 other stuff","starts 2010.12 sth else")
>
> I tried to modify the gsub statement but can't get it working.
> Thank you for your help!
> Dimitri
>
>
> On Tue, Nov 9, 2010 at 12:30 PM, Henrique Dallazuanna <wwwhsd@gmail.com>
> wrote:
> > Try this:
> >
> > gsub("\\.(\\d{1}$)", ".0\\1", x)
> >
> > On Tue, Nov 9, 2010 at 3:28 PM, Dimitri Liakhovitski
> > <dimitri.liakhovitski@gmail.com> wrote:
> >>
> >> Hello again!
> >>
> >> Sorry, if it's a simple question - I am very bad in working with
> strings.
> >>
> >> I have a vector of strings:
> >> x<-c("2000.1","2000.2","2000.10","2000.12")
> >>
> >> I'd like to change it so that it the month always has 2 digits, like
> this:
> >>
> >> "2000.01","2000.02","2000.10","2000.12"
> >>
> >>
> >> Is it possible?
> >> Thanks a lot!
> >> --
> >> Dimitri Liakhovitski
> >> Ninah Consulting
> >> www.ninah.com
> >>
> >> ______________________________________________
> >> R-help@r-project.org mailing list
> >> 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.
> >
> >
> >
> > --
> > Henrique Dallazuanna
> > Curitiba-Paraná-Brasil
> > 25° 25' 40" S 49° 16' 22" O
> >
>
>
>
> --
> Dimitri Liakhovitski
> Ninah Consulting
> www.ninah.com
>



-- 
Henrique Dallazuanna
Curitiba-Paraná-Brasil
25° 25' 40" S 49° 16' 22" O

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