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From |
"Nick Cox" <n.j.cox@durham.ac.uk> |

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

Subject |
RE: st: variable that counts double observations.. |

Date |
Wed, 12 Nov 2008 15:18:13 -0000 |

The first line won't work, as already explained in my earlier posting. But suppose you had a variable with values 1 up. The second line would replace 1,2,3,4,5,6, ... with 1,1,3,3,5,5,... which is not what I think is being asked for. Nick n.j.cox@durham.ac.uk Ashim Kapoor egen var=_n , by(group) by group : replace var=var-1 if mod(var,2)==0 I think this should work. What the second line says is that for every even number var should have the value of the previous var which is itself -1 . Can someone approve this ? I am not 100% certain. On Wed, Nov 12, 2008 at 4:36 PM, Linn Renée Naper <linn.naper@ecgroup.no> wrote: > egen var=_n, by(group) will give me a variable counting from 1 til N within each group of the data. > BUT: how do I tell stata that the observations are double in the sense that I need a variable that repeats each number ones, > like this: 11 22 33 44.... instead of 1 2 3 4..... > I need this variable in order to collapse the data. * * 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**:**Re: st: variable that counts double observations..***From:*"Ashim Kapoor" <ashimkapoor@gmail.com>

**References**:**st: variable that counts double observations..***From:*Linn Renée Naper <linn.naper@ecgroup.no>

**Re: st: variable that counts double observations..***From:*"Ashim Kapoor" <ashimkapoor@gmail.com>

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