Notice: On April 23, 2014, Statalist moved from an email list to a forum, based at statalist.org.
| From | Michael McCulloch <mm@pinestreetfoundation.org> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | st: identifying observations where multiple conditions are met |
| Date | Wed, 13 Nov 2013 12:14:13 -0800 |
Hello, I have data of the structure: id (range 1 to 300) type (for each -id-, should equal only one of two values: 0 or 1). In manual inspection of the data, I see instances exist where, for the same -id-, some records have type==0, and other records have type==1. If I enter . tab id if type==0 & type==1 obviously "no observations" is returned. How would I write a command in which I can tabulate all -id- for which some observations exist where type==0, and others where type==1? (At data entry, -type- should have unique for each -id-.) Best wishes, Michael McCulloch -- Pine Street Foundation, since 1989 124 Pine Street | San Anselmo | California | 94960-2674 P: (415) 407-1357 | F: (206) 338-2391 | http://www.PineStreetFoundation.org * * 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/