Re: [R] help with the unique function

From: Phil Spector <spector_at_stat.Berkeley.EDU>
Date: Wed, 07 May 2008 10:14:28 -0700 (PDT)

Another way to produce the data frame is

subset(as.data.frame(table(x)),Freq>0)

On Wed, 7 May 2008, ravi 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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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 07 May 2008 - 18:26:48 GMT

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