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| From | "Palan, Stefan (stefan.palan@uni-graz.at)" <stefan.palan@uni-graz.at> |
| To | "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |
| Subject | st: Problem with Stata handling of large dataset |
| Date | Mon, 5 Aug 2013 20:46:53 +0200 |
Hi Scott, Okay, sorry, that was stupid. Let me describe two different problems I encountered. When I type the following... clear set obs 20000000 gen id=_n tsset id ...I get an error, since the values of id are not unique. This seems to be an issue having to do with the data type Stata uses for id. If I explicitly define id as type "long", the problem goes away. So I guess I should not rely on Stata to choose the appropriate variable type? Another point I noticed when testing things. When I type... clear set obs 2 gen x=_n by x: gen y=_n ...I get an error message that the values in x are not sorted. Do I have to explicitly sort by x prior to running the last command, even if the values in x are already in the correct order? Stefan. * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/faqs/resources/statalist-faq/ * http://www.ats.ucla.edu/stat/stata/