[R] matching type question, please

Eric Berger
Thu, 16 Dec 2021 20:38:35 -0000

> a <- cbind(c(xr1,xs1),c(xr2,xs2))
> a[duplicated(a)]
[1] 4 4


On Thu, Dec 16, 2021 at 10:18 PM Erin Hodgess <erinm.hodgess at gmail.com>
wrote:
>
> Hello!
>
> I have the following:
>
>  cbind(xr1,xr2)
>
>       xr1 xr2
>
>  [1,]   8   0
>
>  [2,]   7   1
>
>  [3,]   6   2
>
>  [4,]   5   3
>
>  [5,]   4   4
>
>  [6,]   3   5
>
>  [7,]   2   6
>
>  [8,]   1   7
>
>  [9,]   0   8
>
> > cbind(xs1,xs2)
>
>      xs1 xs2
>
> [1,]   9   4
>
> [2,]   8   4
>
> [3,]   7   4
>
> [4,]   6   4
>
> [5,]   5   4
>
> [6,]   4   4
>
> [7,]   3   4
>
> >
>
> These are ordered pairs.  I would like to get something that shows that the
> pair (4,4) appears in both.  I have tried cbind with match and %in% and
> intersect, but not getting the exact results.
>
> Any suggestions would be appreciated.  I have a feeling that it's
something
> really easy that I'm just not seeing.
>
> Thanks,
> Erin
>
>
> Erin Hodgess, PhD
> mailto: erinm.hodgess at gmail.com
>
>         [[alternative HTML version deleted]]
>
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