Ilaria wrote:
I have the population per zipcode of all postcodes of a country. I wanna
create a weight, which results from the population per zipcode divided
by total population.
My questions:
1. The population per zipcode is repeated many times in the file. To
make the weight I only need to count it once. How can I do so?
2. I don't have the value for the total population. How can I have it?
--------------------------------------------------------------
If yout have the two variables -zip- and -pop- you can:
sort zip
drop if zip==zip[_n-1]
egen totpop=total(pop)
gen wgt=pop/totpop
Hope this helps
Svend
__________________________________________
Svend Juul
Institut for Folkesundhed, Afdeling for Epidemiologi
(Institute of Public Health, Department of Epidemiology)
Vennelyst Boulevard 6
DK-8000 Aarhus C, Denmark
Phone: +45 8942 6090
Home: +45 8693 7796
Email: [email protected]
__________________________________________
*
* 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/
