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st: RE: RE: Resdesigning dyadic data formats


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: RE: Resdesigning dyadic data formats
Date   Tue, 20 Apr 2004 14:35:52 +0100

The second line is unnecessary. 

Nick 
n.j.cox@durham.ac.uk 

> -----Original Message-----
> From: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu]On Behalf Of Nick Cox
> Sent: 20 April 2004 14:18
> To: statalist@hsphsun2.harvard.edu
> Subject: st: RE: Resdesigning dyadic data formats
> 
> 
> fillin c1 c2
> replace x = . if _fillin
> drop _fillin 
> 
> Nick 
> n.j.cox@durham.ac.uk 
> 
> Neumayer,E
>  
> > I have a "dyadic" dataset that looks like this (which is the 
> > traditional way of setting up such data):
> > 
> > c1	c2	x
> > 1	2	567
> > 1	3	345
> > 1	4	7
> > 1	5	348
> > 2	3	47
> > 2	4	3
> > 2	5	48
> > 3	4	23424
> > 3	5	347
> > 4	5	234
> > 
> > The "c1" and "c2" are identifiers for the two dyads. I would 
> > like to re-design the data to have it in the following format:
> > 
> > c1	c2	x
> > 1	1	
> > 1	2	567
> > 1	3	345
> > 1	4	7
> > 1	5	348
> > 2	1	567
> > 2	2	
> > 2	3	47
> > 2	4	3
> > 2	5	48
> > 3	1	345
> > 3	2	47
> > 3	3	
> > 3	4	23424
> > 3	5	347
> > 4	1	7
> > 4	2	3
> > 4	3	23424
> > 4	4	
> > 4	5	234
> > 5	1	348
> > 5	2	48
> > 5	3	347
> > 5	4	234
> > 5	5	
> > 
> > Note that now the identical pairs (1-1, 2-2, 3-3, 4-4, 5-5) 
> > have missing x-values, of course, and that all x-values exist 
> > twice now (e.g., once for 1-5, and once for 5-1). I know, one 
> > could do this redesigning by hand, but given that my actual 
> > dataset is far bigger, I am looking for a way to let Stata do 
> > the work for me. Any ideas?
> > 
> 
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