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Like Steve, I am not clear what is meant, but other possibilities include . egen group = group(A B C) [to create a composite variable] . groups A B C [to list combinations of categories that occur; -groups- is from SSC] See also SJ-3-4 pr0011 . . . . . . . . Speaking Stata: Problems with tables, Part II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N. J. Cox Q4/03 SJ 3(4):420--439 (no commands) reviews three user-written commands (tabcount, makematrix, and groups) as different approaches to tabulation problems SJ-7-4 dm0034 . . . Stata tip 52: Generating composite categorical variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N. J. Cox Q4/07 SJ 7(4):582--583 (no commands) tip on how to generate categorical variables using tostring and egen, group() Nick n.j.cox@durham.ac.uk Steve Samuels Not sure what you mean, but maybe -tablist- ? net describe tablist, from(http://www.ats.ucla.edu/stat/stata/ado/analysis) Ben > I have some factors that are not mutually exclusive and i want to bin my > data among the various permutations of the factors. > > For example say there are two factors A and B. There are 4 possibilities: > none, A, B and AB. For 3 factors A B & C there are 8 possible outcomes: > none, A, B, C, AB, AC, BC, and ABC. As the number of factors grows the > number of permutations doubles, e.g., 5 factors have 64 permutations. > > Is there any clever .do file to bin cases between multiple factors? Or > alternatively any advice on a loop file that both bins the cases, and uses > the factor name to create labels. I have 5 factors I am interested in > binning between. > * * 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/

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