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RE: st: non-mutually exclusive factors


From   Nick Cox <n.j.cox@durham.ac.uk>
To   "'statalist@hsphsun2.harvard.edu'" <statalist@hsphsun2.harvard.edu>
Subject   RE: st: non-mutually exclusive factors
Date   Sun, 10 Oct 2010 16:59:21 +0100

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.
>

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