Hi Ravi,

Try this:

x<-data.frame(a=c(1,2,3,1,2),b=c(2,3,4,2,3),c=c(10,20,30,10,20))
cbind(unique(x),lapply(x,table)$c)[,-4]
a b  c Freq
1 1 2 10    2
2 2 3 20    2
3 3 4 30    1


HTH,

Jorge


On Wed, May 7, 2008 at 12:11 PM, ravi <rv15i@yahoo.se> wrote:

> Hi,
> The unique function is easy to understand and use. Beyond that, I want to
> get also the frequency of repetition of each individual row in a data frame
> Let me explain with an example :
> x<-data.frame(a=c(1,2,3,1,2),b=c(2,3,4,2,3),c=c(10,20,30,10,20))
> xu<-unique(x)
> We have,
> > x
>   a b  c
> 1 1 2 10
> 2 2 3 20
> 3 3 4 30
> 4 1 2 10
> 5 2 3 20
> > xu
>   a b  c
> 1 1 2 10
> 2 2 3 20
> 3 3 4 30
>
> I want to get the following data frame :
>   a b  c    Freq
> 1 1 2 10    2
> 2 2 3 20    2
> 3 3 4 30    1
> That is, in addition to the unique rows, I want to get the frequency of
> repetion of each individual row.
> I will appreciate all the help that I can get.
> Thank You,
> Ravi
>
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> PLEASE do read the posting guide
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

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