Functions and CALL Routines

CALL RANPERK Routine

Randomly permutes the values of the arguments, and returns a permutation of k out of n values

Category:

Random Number

Syntax
Arguments
Examples
See Also

Syntax

CALL RANPERK(seed, k, variable-1<, variable-2, ...>);

Arguments

seed: is a numeric variable that contains the random number seed. For more information about seeds, see Seed Values.
k: is the number of values that you want to have in the random permutation.
variable: specifies all numeric variables, or all character variables that have the same length. K values of these variables are randomly permuted.

Examples

The following example shows how to generate random permutations of given values by using the CALL RANPERK routine.

data _null_;
   array x x1-x5 (1 2 3 4 5);
   seed = 1234567890123;
   do n=1 to 10;
      call ranperk(seed, 3, of x1-x5);
      put seed= @20 ' x= ' x1-x3;
   end;
run;

The following lines are written to the SAS log:

   seed=1332351321     x= 5 4 2
   seed=829042065      x= 4 1 3
   seed=767738639      x= 5 1 2
   seed=1280236105     x= 3 2 5
   seed=670350431      x= 4 3 5
   seed=1956939964     x= 3 1 2
   seed=353939815      x= 4 2 1
   seed=1996660805     x= 3 4 5
   seed=1835940555     x= 5 1 4
   seed=910897519      x= 5 1 2