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Re: st: AW: dealing with duplicate "pairs" of columns


From   "Vitorino, Maria Ana" <vitorino@wharton.upenn.edu>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: AW: dealing with duplicate "pairs" of columns
Date   Thu, 11 Feb 2010 03:01:29 -0500

Thanks! This is very helpful!

Maria Ana


On Feb 10, 2010, at 8:36 AM, "Martin Weiss" <martin.weiss1@gmx.de>  
wrote:

>
> <>
>
>
>
> *************
> clear*
>
> input byte(Person1_id ClosestPerson  Person1_age)
> 1            2            10
> 2            1            20
> 3            1            30
> 4            3            40
> end
>
> gen lower=min( Person1_id, ClosestPerson)
> gen upper=max( Person1_id, ClosestPerson)
> bys lower upper ( Person1_age): gen byte dup=!(_N==1)
> by lower upper ( Person1_age): replace dup=2 if _n==_N &dup!=0
> l, noo
> *************
>
>
>
> HTH
> Martin
>
>
> -----Ursprüngliche Nachricht-----
> Von: owner-statalist@hsphsun2.harvard.edu
> [mailto:owner-statalist@hsphsun2.harvard.edu] Im Auftrag von  
> Vitorino, Maria
> Ana
> Gesendet: Mittwoch, 10. Februar 2010 15:21
> An: statalist@hsphsun2.harvard.edu
> Betreff: st: dealing with duplicate "pairs" of columns
>
> Hi all,
> I was wondering if there was a relatively simple way to achieve the
> following:
>
> My data looks like this:
>
> Person1_id ClosestPerson  Person1_age
> 1            2            10
> 2            1            20
> 3            1            30
> 4            3            40
> ...
>
> What I would like to do is to signal "duplicate" rows for which  
> Person1 is
> the oldest. Since this is hard to explain, the resulting data would  
> be for
> the example above:
>
> Person1_id ClosestPerson  Person1_age  dup
> 1            2            10
> 1
> 2            1            20
> 2
> 3            1            30
> 0
> 4            3            40
> 0
> ...
>
> Note that the column dup has the following coding:
> dup=1 if there is another pair of ppl identical to the one in this  
> row and
> Person1 is the youngest of the pair
> dup=2 if there is another pair of ppl identical to the one in this  
> row and
> Person1 is the oldest of the pair
> dup=0 if there is no other pair of ppl identical to the one in this  
> row
>
> Hope this isn't too confusing...
> Suggestions are welcome!
>
> Thanks,
> Maria Ana
>
>
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