FACT Fuction

Use the FACT function to determine the number of permutations possible, then generate all permutations of said variables with CALL ALLPERM.

Note:   CALL ALLPERM and CATS function are new in SAS 9.0.

data test;

  drop i perms;

  array x (3) $3 ('a' 'b' 'c'); 

  /* create a new variable of the concatenated results */

  length new $3;

  perms=fact(3); 

    do i=1 to perms;   

      call allperm(i, of x(*));

      new= cats(of x(*));

      output;

      end;

run;

proc print;

run;

output

Obs    x1    x2    x3    new

 1     a     b     c     abc

 2     a     c     b     acb

 3     c     a     b     cab

 4     c     b     a     cba

 5     b     c     a     bca

 6     b     a     c     bac