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From |
"Dimitriy V. Masterov" <dvmaster@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: BASIC QUESTION - counts of counts |

Date |
Fri, 22 Jul 2011 15:32:26 -0400 |

Ben, Try a preserve before and a restore after. DVM On Fri, Jul 22, 2011 at 3:30 PM, Ben Hoen <bhoen@lbl.gov> wrote: > Dimitry's file is perfect, except that I do not want to have to reload the > original table (Fernando - there is a host of other pertinent info > additionally in the table so they are not actually duplicates as I showed > below in my simple example). > > So, is there any way to produce what is in the Dimitry table in the output > panel? (for example like a tab produces a table of frequencies) > > Ben > ====================================== > Re: st: BASIC QUESTION - counts of counts > From Fernando Rios Avila <f.rios.a@gmail.com> > To statalist@hsphsun2.harvard.edu > Subject Re: st: BASIC QUESTION - counts of counts > Date Fri, 22 Jul 2011 15:10:05 -0400 > > Well, i would first drop the duplicate obsevations: > duplicates drop state county > and then use Dimitriy code. > > On Fri, Jul 22, 2011 at 3:06 PM, Dimitriy V. Masterov > <dvmaster@gmail.com> wrote: >> Does this do what you want? >> >> collapse (count) county, by(state) >> >> DVM >> On Fri, Jul 22, 2011 at 2:59 PM, Ben Hoen <bhoen@lbl.gov> wrote: >>> Can someone help me to produce a table that counts the number of unique >>> occurrences of a group inside another group? >>> >>> For example assume I had the following table: >>> >>> Number State County >>> 1 NY Madison >>> 2 NY Madison >>> 3 PA Somerset >>> 4 NY Oneida >>> 5 PA Somerset >>> 6 PA Wayne >>> 7 PA Luzerne >>> >>> I want to produce a table like this: >>> State County >>> NY 2 >>> PA 3 >>> >>> Any ideas? >>> >>> Ben > > > > * > * 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/ > * * 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: BASIC QUESTION - counts of counts***From:*"Ben Hoen" <bhoen@lbl.gov>

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