[S] creat dummy variables

["Jing (Jane) Xu" <jxu@athena.biostat.jhsph.edu>]

Hi, everyone,

Is there a simple way to create (n-1) dummy variables from a single
variable which takes values 0,1,...,n-1?

Say, I have a variable f like:
        f
        0
        2
        1
        2
        0
how can I get something like:
        d1      d2      
        0       0       
        1       1
        1       0
        1       1
        0       0
        
Any help would be greatly appreciated!

Jane


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