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| From | Maarten Buis <maartenlbuis@gmail.com> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | Re: st: Re: format |
| Date | Mon, 30 Jul 2012 16:21:37 +0200 |
You can just leave the string in your dataset and create a new numeric id like this bys stringid : gen numid = _n == 1 replace numid = sum(numid) -- Maarten On Mon, Jul 30, 2012 at 4:16 PM, Chiara Mussida <cmussida@gmail.com> wrote: > encode works. The only constraint is that it does not encode string > variables that takes more than 65,536 unique values. > Thanks > > On 29/07/2012, Joseph Coveney <jcoveney@bigplanet.com> wrote: >> Chiara Mussida wrote: >> >> i have a string variable of 18 lenght. This is my id and i need it >> numerical. I proceeded with destring and i got a numerical variable in >> double format. I tried to get it in the format %18.0f, but i realised >> that stata does not maintain the original number. It approx each >> variable and in this way i cannot get a unique id Per individual. Do >> you know whether it is a problem of wrong format? >> >> -------------------------------------------------------------------------------- >> >> It is not a problem of the wrong format. At the command line type: >> >> help data_types >> >> and examine the precision of Stata's numerical data types. >> >> I'm curious as to why you believe that you must store eighteen-character IDs >> as >> numbers. If you need to obtain a numerical ID for use of one of Stata's >> -xt- >> commands, then you can use -encode-. >> >> Joseph Coveney >> >> >> * >> * 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/ >> > > > -- > Chiara Mussida > PhD candidate > Doctoral school of Economic Policy > Catholic University, Piacenza (Italy) > * > * 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/ -- -------------------------- Maarten L. Buis Institut fuer Soziologie Universitaet Tuebingen Wilhelmstrasse 36 72074 Tuebingen Germany http://www.maartenbuis.nl -------------------------- * * 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/