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

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Ranking observations of a variable across a set of variables |

Date |
Wed, 2 Nov 2011 09:14:18 +0000 |

Also, specifically, the Stata Journal of -rowranks- supersedes the version on SSC. The SSC version was left untouched because it works in Stata 6 up, whereas the SJ version requires Stata 9 at least, given Mata code therein. Nick On Wed, Nov 2, 2011 at 7:51 AM, Nick Cox <njcoxstata@gmail.com> wrote: > For a detailed review of this and similar problems, see > > SJ-9-1 pr0046 . . . . . . . . . . . . . . . . . . . Speaking Stata: Rowwise > (help rowsort, rowranks if installed) . . . . . . . . . . . N. J. Cox > Q1/09 SJ 9(1):137--157 > shows how to exploit functions, egen functions, and Mata > for working rowwise; rowsort and rowranks are introduced > > Note that -egen-'s -rank()- function is not producing incorrect > results; it just does not produce what Jennifer wants and does not > claim to. It ranks observations on the values of a variable, not > variables on the values of a set of variables in each observation. > > Nick > > On Wed, Nov 2, 2011 at 5:02 AM, Tirthankar Chakravarty > <tirthankar.chakravarty@gmail.com> wrote: > >> You probably want Nick Cox's -rowranks- package, available from SSC: >> >> ***************************************** >> clear* >> input x1 x2 x3 x4 >> 50 10 30 60 >> 20 60 10 40 >> end >> ssc install rowranks >> rowranks x1-x4, generate(rank1-rank4) field >> li >> ***************************************** >> > >> On Tue, Nov 1, 2011 at 8:24 PM, Jennifer L. Milosch >> <milosch@umail.ucsb.edu> wrote: > >>> I am trying to find the rank of an observation of a variable across a set of >>> variables. My data looks something like this: >>> >>> x1|x2|x3|x4 >>> 50|10|30|60 >>> 20|60|10|40 >>> >>> I want to generate a variable for the rank of x1 compared to the values of >>> x1, x2, x3, and x4 for each observation in the data. I have tried using >>> >>> -bysort x1 x2 x3 x4: egen rank1=rank(x1)- >>> >>> but it is returning a variable of all ones, which is not correct. Using the >>> data above, I'm look for variables that are: >>> >>> rank1|rank2|rank3|rank4 >>> 2 |4 |3 |1 >>> 3 |1 |4 |2 * * 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: Ranking observations of a variable across a set of variables***From:*"Jennifer L. Milosch" <milosch@umail.ucsb.edu>

**Re: st: Ranking observations of a variable across a set of variables***From:*Tirthankar Chakravarty <tirthankar.chakravarty@gmail.com>

**Re: st: Ranking observations of a variable across a set of variables***From:*Nick Cox <njcoxstata@gmail.com>

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