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Re: AW: AW: st: add new record for individual in dataset


From   Jeph Herrin <junk@spandrel.net>
To   statalist@hsphsun2.harvard.edu
Subject   Re: AW: AW: st: add new record for individual in dataset
Date   Wed, 28 Oct 2009 09:14:48 -0400


just tag those

 bys id (begin) : gen last=_n==_N
 expand 2 if last
 bys id last : replace begin=end[1] if _n==2
 bys id last (begin) : replace end=. if _n==2
 bys id last (begin) : replace cens=1 if _n==2


J



Martin Weiss wrote:
<>
It does it well, conditional on there being only 1 observation per id to
begin with, which is not the case for -id==3-


l ,noo sepby(id)

  +--------------------------+
  | id   begin    end   cens |
  |--------------------------|
  |  1    1997   2006      0 |
  |  1    2006      .      1 |
  |--------------------------|
  |  2    1997   2003      0 |
  |  2    2003      .      1 |
  |--------------------------|
  |  3    1997   2004      0 |
  |  3    1997      .      1 |
  |  3    2004   2007      0 |
  |  3    2007   2007      0 |
  |--------------------------|
  |  4    1997   2006      0 |
  |  4    2006      .      1 |
  +--------------------------+


HTH
Martin


-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Jeph Herrin
Gesendet: Mittwoch, 28. Oktober 2009 13:33
An: statalist@hsphsun2.harvard.edu
Betreff: Re: AW: st: add new record for individual in dataset


Then

  expand 2
  bys id : replace begin=end[1] if _n==2
  bys id (begin) : replace end=. if _n==2
  bys id (begin) : replace cens=1 if _n==2

will do it.

J


Martin Weiss wrote:
<>
Stata probably won`t like the line "bys id : replace begin[2]=end[1]" and
complain that "weights (are) not allowed"...



HTH
Martin


-----Ursprüngliche Nachricht-----
Von: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von Jeph Herrin
Gesendet: Mittwoch, 28. Oktober 2009 13:08
An: statalist@hsphsun2.harvard.edu
Betreff: Re: st: add new record for individual in dataset


Try

   expand 2
   bys id : replace begin[2]=end[1]
   bys id (begin) : replace end[2]=.
   bys id (begin) : replace cens[2]=1

hth,
Jeph


Marcus Casey wrote:
Hi,

Does anyone know how I can add a new record for an id in a long form dataset?
Specifically , I have a dataset with the following structure

id	begin 	end		cens
1	1997	2006	   0
2 	1997	2003	   0
3	1997	2004	   0
3	2004	2007          0
4	1997	2006	   0

and I want to add an additional record for each id in the following manner

id	begin	end		cens
1	1997	2006	    0
1	2006	   .		    1	
2  	1997	2003           0
2      2003	    .   	    1
3	1997	2004   	    0
3	2004	2007	    0
3	2007          .		    1
4	1997	2006	    0
4	2006	   .		    1


Thanks in advance

Regards,
Marcus



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