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From |
Maarten buis <maartenbuis@yahoo.co.uk> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: function to calculate frequencies |

Date |
Mon, 6 Oct 2008 07:55:28 +0100 (BST) |

--- Javier Lázaro <javierlazaro9@gmail.com> wrote: > I am a beginner programmer of Stata, I am doing an ado file where I > need to calculate a determined frequency, but I can´t use the command > "tabulate" (it doesn´t give me exactly what I want). > For example, I would like to obtain the frequency for a variable of a > number that, perhaps, there aren´t any observation. ( I can´t achieve > it with tabulate, because it returns only the existing frequencies). If you want to allow for the possibility that a category is empty then you can't rely on the data to tell you which categories you should compute the frequencies over. So you will have to specify the categories. In that case -count- is the most basic command for computing frequencies, see the silly example below. Alternatively, you can take a look at Ben Jann's -fre- command, see -ssc describe fre-. *---------------- begin example ---------------- sysuse auto, clear foreach i in 0 1 300 { qui count if foreign == `i' di as text "`i' " as result r(N) } *----------------- end example ----------------- (For more on how to use examples I sent to the Statalist, see http://home.fsw.vu.nl/m.buis/stata/exampleFAQ.html ) Hope this helps, Maarten ----------------------------------------- Maarten L. Buis Department of Social Research Methodology Vrije Universiteit Amsterdam Boelelaan 1081 1081 HV Amsterdam The Netherlands visiting address: Buitenveldertselaan 3 (Metropolitan), room N515 +31 20 5986715 http://home.fsw.vu.nl/m.buis/ ----------------------------------------- * * 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: function to calculate frequencies***From:*"Nick Cox" <n.j.cox@durham.ac.uk>

**References**:**st: function to calculate frequencies***From:*"Javier Lázaro" <javierlazaro9@gmail.com>

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