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Re: st: Network - double back relation
From
Nick Cox <[email protected]>
To
"[email protected]" <[email protected]>
Subject
Re: st: Network - double back relation
Date
Wed, 6 Nov 2013 09:32:05 +0000
gen pair = string(min(source, target)) + " " + string(max(source, target))
bysort pair : drop if _n == 2
SImilar questions are often discussed on this list, e.g. search for posts citing
SJ-8-4 dm0043 . Tip 71: The problem of split identity, or how to group dyads
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N. J. Cox
Q4/08 SJ 8(4):588--591 (no commands)
tip on how to handle dyadic identifiers
accessible at http://www.stata-journal.com/sjpdf.html?articlenum=dm0043
Nick
[email protected]
On 6 November 2013 09:24, Simon Falck <[email protected]> wrote:
> Hi Statalist,
>
> Using Stata 13.1 and aiming at a simple descriptive network plot but bump
> into the issue of double back relations among the edges, i.e. some of the
> networks actually double back on themselves. Here is an sample of my
> dataset:
>
> source target weight
> 1 1 1
> 2 2 1
> 3 3 3
> 3 5 3
> 3 8 3
> 4 4 1
> 5 3 3
> 5 5 16
> 5 8 3
> 6 6 1
> 7 7 1
> 8 3 3
> 8 5 3
> 8 8 21
> 9 9 1
>
> For instance, there is a relationship between source '3' and target '5', and
> thus also between target '5' and source '3'. My question is how do I manage
> to only keep one way relation between 'source' and 'target', i.e. how do I
> delete (drop) the double back relationship?
>
> I could be noted that double back relationships has been mentioned in an
> earlier discussion:
> http://www.stata.com/statalist/archive/2013-09/msg00142.html
>
> Thanks in advance!
>
> Best,
> Simon
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