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From |
"Vitorino, Maria Ana" <vitorino@wharton.upenn.edu> |

To |
"statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |

Subject |
st: dealing with duplicate "pairs" of columns |

Date |
Wed, 10 Feb 2010 09:21:12 -0500 |

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 * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**Follow-Ups**:**st: AW: dealing with duplicate "pairs" of columns***From:*"Martin Weiss" <martin.weiss1@gmx.de>

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