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From |
Joseph Coveney <jcoveney@bigplanet.com> |

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

Subject |
st: How to calculate 75 percentile of other individuals on the samegroup |

Date |
Sat, 29 Sep 2007 14:57:11 -0700 |

Quang Nguyen wrote: A simplified version of my data looks as follows: ID Group X 1 a 5 2 a 7 3 a 9 4 a 8 5 b 3 6 b 4 7 b 9 .......................... I would like to generate a new variable whose value is the 75 percentile of other individuals in the same group as the concerned individual. For example, for the first individual (ID=1), this will be: 75 percentile of {7, 9, 8}. I would highly appreciate if someone could suggest me a solution for this. -------------------------------------------------------------------------------- -findit percentile- turns up a lot to pore over. But among the results is -egen <varname> = pctile(exp), p(#)-, which can take a -by- varlist. Try something like: bysort Group: egen p75 = pctile(X), p(75) Joseph Coveney * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

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