[R] Select Original and Duplicates

[Rui Barradas]

Hello,

Try the following.


idx <- duplicated(df) | duplicated(df, fromLast = TRUE)
df[idx, ]

Note that they are returned in their original order in the df.

Hope this helps,

Rui Barradas

Em 28-09-2012 21:11, Adam Gabbert escreveu:
> I would like to select a all the duplicate rows of a data frame including
> the original.  Any help would be much appreciated.  This is where I'm at so
> far. Thanks.
>
> #Sample data frame:
> df <- read.table(header=T, con <- textConnection('
>   label value
>       A     4
>       B     3
>       C     6
>       B     3
>       B     1
>       A     2
>       A     4
>       A     4
> '))
> close(con)
>
> # Duplicate entries
> df[duplicated(df),]
>
> # label value
> #     B     3
> #     A     4
> #     A     4
>
> #I want to select all the rows that are duplicated including the original
> #This is the output I want
> # label value
> #     B     3
> #     B     3
> #     A     4
> #     A     4
> #     A     4
>
> 	[[alternative HTML version deleted]]
>
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