[R] Removing all duplicate row except by one

[Justin]

m.marcinmichal <m.marcinmichal <at> gmail.com> writes:

> 
> Hi,
> It's my problem, supppose that we have a data.frame:
> 
-snip-

You should avoid using t as a variable name since its an important
R function!


> I need extract duplicat row i.e i nedd frame like this
> 
>   a b c
> 3 1 1 1
> 8 0 1 0
> 

not sure if this will get you there but if you data is 
in a variable named dat... 


> unique(dat[duplicated(dat),])
  a b c
3 1 1 1
8 0 1 0


> I try use subset(t, duplicated(t)) and t[duplicated(t), ] but this command
> return
> 
>   a b c
> 3 1 1 1
> 7 1 1 1
> 8 0 1 0
> 
> Best
> 
> Marcin M.
> 
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> 
>