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From |
Nick Cox <njcoxstata@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: RE: Listing the first 5 observations |

Date |
Wed, 29 Aug 2012 15:32:58 +0100 |

That gives a sample of all ages, by the sound of it far more than is wanted. Nick On Wed, Aug 29, 2012 at 3:29 PM, Cohen, Elan <cohened@upmc.edu> wrote: > How about: > > bys age (random): l if _n<=5 > Damian Finlayson > I am trying to randomly select a number of observations according a > set criteria. > > Say I have 3 variables: var1, var2 and random. Var1 consists purely > of unique values (such as names). Var 2 has groups/categories (e.g. > age). Random consists of unique random numbers. > > I would like to get stata to sort each category (age) by a random > number and then list the first 5 names for a given age say 49. > > The command I am trying to use is: > > list var1 if age == 49 > > but I cannot seem to amend this command so that only the first 5 > observations (as per the random number) are listed. If I use in 1/5 > it does not work as the first observation for age 49 could be the 53 > observation the second at 114 and so on. If I ask for all > observations I could end up with thousands of names being listed. * * 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/

**References**:**st: Listing the first 5 observations***From:*Damian Finlayson <damian.finlayson@gmail.com>

**st: RE: Listing the first 5 observations***From:*"Cohen, Elan" <cohened@upmc.edu>

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