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From |
"Nick Cox" <n.j.cox@durham.ac.uk> |

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

Subject |
Age groups [was: st: RE: RE: Question about tabsort ... ] |

Date |
Fri, 12 Jul 2002 18:21:26 +0100 |

Rodrigo Briceņo" <rbriceno@sanigest.com> 2. Months ago I asked to the list how can I generate some age groups. I use that help in order to have a frequency of the hospital discharges by age groups. The problem here is that I found that my variable age was a string8 variable. Then the options to generate a new variable was restricted: I tried typing: gen str8 rank_edad=1 if inrange(edad,0,0) to construct my age groups (less than 1 year, between 1 and 4, between 5 and 9, 10-19, 20-29, 30-39, 40-49, 50-59 and the last one 60 or more) > That's not going to work as you typed it because > strings need to be in " ". This not work for me so I try: encode edad, gen (edad2) like I learned from my net course on Stata. The things appear to be ok, because when I type tab edad2 I see all the ages correctly. The problem here is that I'm building three groups (the first three) that donīt have data on it. But Stata is calculating something on it, I don't know why. gen byte rank_edad=1 if range(edad2,0,0) replace rank_edad=2 if inrange (edad2,1,4) replace rank_edad=3 if inrange (edad2,5,9) replace rank_edad=4 if inrange (edad2,10,19) and so on..... tab rank_edad rank_edad | Freq. Percent Cum. ------------+----------------------------------- 1-4_anos | 90 1.73 1.73 5-9_anos | 1190 22.88 24.61 10-19_anos | 2114 40.64 65.24 20-29_anos | 892 17.15 82.39 30-39_anos | 304 5.84 88.24 40-49_anos | 202 3.88 92.12 50-59_anos | 162 3.11 95.23 Mas_60_anos | 248 4.77 100.00 ------------+----------------------------------- Total | 5202 100.00 Do you know or guess why Stata is putting data on the first three groups that is supposed to be empty (I build those groups because I'm making a do file, that I can apply to other databases). Thanks.... Rodrigo Nick n.j.cox@durham.ac.uk * * 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/

**Follow-Ups**:**RE: Age groups [was: st: RE: RE: Question about tabsort ... ]***From:*"Nick Cox" <n.j.cox@durham.ac.uk>

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