Many thanks!
all methods work well! thanks again!

On Sun, Feb 6, 2011 at 8:42 PM, Ray Brownrigg
<Ray.Brownrigg@ecs.vuw.ac.nz>wrote:

> It's not quite clear what the OP really wanted.  A more general solution
> may be:
>
> > a=c(4, 3, 2, 3)
> > ta <- table(a)
> > ta
> a
> 2 3 4
> 1 2 1
> > ta[as.character(a)]
> a
> 4 3 2 3
> 1 2 1 2
> >
> HTH
> Ray Brownrigg
>
> On Mon, 07 Feb 2011, Jorge Ivan Velez wrote:
> > Hi Carrie,
> >
> > Try
> >
> > > x <- rle(a)
> > > rep(x$lengths, x$lengths)
> >
> > [1] 1 2 2 1
> >
> > HTH,
> > Jorge
> >
> > On Sun, Feb 6, 2011 at 8:21 PM, Carrie Li <> wrote:
> > > Hello R-helpers,
> > >
> > > I have a question about counting numbers.
> > > Here is a simple example.
> > >
> > > a=c(2, 3, 3,4)
> > >
> > > > table(a)
> > >
> > > a
> > > 2 3 4
> > > 1 2 1
> > >
> > > so, I can to create another variables that has the corresponding
> counting
> > > numbers.
> > > In this case, I want to have:
> > >
> > > b=c(1,2,2,1)
> > >
> > > Is there any way coding for this ?
> > >
> > > Thanks for helps!
> > >
> > > Carrie--
>

	[[alternative HTML version deleted]]

