Perfect!
Thank you a lot!
2014-05-28 21:57 GMT-03:00 arun <smartpink...@yahoo.com>:
> Hi,
> If it ordered by the variable "x", you could also try:
>
>
> within(DF1, new_c<-sequence(table(x)))
>
>
> A.K.
>
>
>
>
> On Wednesday, May 28, 2014 6:14 PM, Andrija Djurovic <djandr...@gmail.com>
> wrote:
> Here is another approach:
>
> x <- rep(c("A", "B", "C"), c(3,1,2))
> DF1 <- data.frame(x)
> cbind(DF1, new_c=ave(as.numeric(DF1$x), DF1$x, FUN=function(x)
> 1:length(x)))
>
> Note the difference between DF (in previous solution) and DF1
> str(DF)
> str(DF1)
>
>
> Andrija
>
>
>
>
>
> On Thu, May 29, 2014 at 12:03 AM, Andrija Djurovic <djandr...@gmail.com
> >wrote:
>
> > Hi. Here is one approach:
> >
> > x <- rep(c("A", "B", "C"), c(3,1,2))
> > DF <- data.frame(x, stringsAsFactors=FALSE)
> > cbind(DF, new_c=c(lapply(rle(DF$x)[[1]], function(x) 1:x), recursive=T))
> >
> > Andrija
> >
> >
> > On Wed, May 28, 2014 at 10:46 PM, Marcos Santos <mmsantos...@gmail.com
> >wrote:
> >
> >> I have a "data frame" like this:
> >>
> >> Category Observed_value A 100 A 130 A 140 B 90 C 80 D 120 D 130
> >>
> >> I need to create an index column that show the number of the observation
> >> for each category. I have three observations in the category A, one in
> >> category B, one in category C and two in category D. The new matrix
> should
> >> be like this:
> >>
> >>
> >> Category Observed_value Index A 100 1 A 130 2 A 140 3 B 90 1 C
> 80 1
> >> D 120 1 D 130 2
> >>
> >> Please, could anyone help me with this problem?
> >>
> >> Thank you.
> >> --
> >> Marcos Martins Santos
> >> mmsantos...@gmail.com
> >> --
> >> Skype: marcosmartinssantos
> >>
> >> [[alternative HTML version deleted]]
> >>
> >> ______________________________________________
> >> 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.
> >>
> >
> >
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> 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.
>
>
--
Marcos Martins Santos
mmsantos...@gmail.com
--
Tel. (85) 3044-7436
Cel. (85) 9636-6612
--
Skype: marcosmartinssantos
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