[R] Find "undirected" duplicates in a tibble

[Kimmo Elo]

Hi!

Thank you very much for the fascinating solutions. Nice to learn
different approaches. All solutions seem to work with text data as
well.

@Gabor (who suggested the 'igraph' package): yes, I am familiar with
'igraph' and the solution suggested by you works fine, too. Since I
need this kind of "simplification" of my datasets in many analysis
outside network analysis, I just wanted to figure out alternatives :-)

Best,

Kimmo



pe, 2021-08-20 kello 16:38 +0300, Eric Berger kirjoitti:
> x %>% transmute( a=pmin(Source,Target), b=pmax(Source,Target)) %>%
>   unique() %>% rename(Source=a, Target=b)
> 
> 
> 
> On Fri, Aug 20, 2021 at 2:12 PM Greg Minshall <minshall using umich.edu>
> wrote:
> 
> > Kimmo,
> > 
> > i'll be curious to see other, maybe more elegant, answers.  in the
> > meantime, this seems to work.
> > 
> > ----
> >   x = data.frame(Source=rep(1:3,4),
> > Target=c(rep(1,3),rep(2,3),rep(3,3),rep(4,3)))
> >   y <- apply(x, 1, function(y) return (c(n=min(y), x=max(y))))
> >   res <- data.frame()
> >   for (n in unique(y["n",])) {
> >     unique(y["x",y["n",]==n])
> >     res <- rbind(res, data.frame(A=c(n),
> > B=unique(y["x",y["n",]==n])))
> >   }
> >   res
> > ----
> > 
> > thanks for the question!
> > 
> > cheers, Greg
> > 
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