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| From | Lynne Morgan <lmorgan3@wisc.edu> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | st: Collapse error: "Factor variables not allowed" |
| Date | Tue, 11 Dec 2012 10:27:19 -0600 |
Hi All,I have a dataset that I need to collapse by the id number because each ID has several rows (hhidnum). Mostly I just want to know the sum, because the variables are if a condition is present or absent (1/0) in the various rows for each ID. Here is the code that I run:
*Collapse by HHIDcollapse (sum) segmentnum SBE_SEGLEN SBE_1A SBE_1B SBE_1C SBE_1D SBE_1E SBE_1F /// diSBE_12A diSBE_12B diSBE_12C diSBE_12D diSBE_12E diSBE_12F diSBE_12G diSBE_12H ///
SBE_11A SBE_11B SBE_11C SBE_11D SBE_11E littersmall litterhaz ///
(mean) meanmph=SBE_5A meanlanes=SBE_7A ///
by(hhidnum) cw
The error I get, though, is "factor variables not allowed". What does
this mean? How do I get around it?
Thanks so much! -- Lynne Morgan, MPH Assistant Researcher Survey of the Health of Wisconsin University of Wisconsin, Madison (e) lmorgan3@wisc.edu (p) 608-821-1243 * * 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/