Handbook of SAS DATA Step Programming

16 Handbook of SAS

®

DATA Step Programming

The last SELECT group creates the variable HIGHINCOME. In this

SELECT group, no select-expression is specied. In this situation, the when-

expression is evaluated for selecting which WHEN statement is to be

executed.

Program 2.12:

data hearing2_9;

set hearing;

length ethnic $ 10;

select (race);

when ("W", "H") ethnic = "white";

when ("B", "A") ethnic = "non-white";

end;

select (preg);

when (1) do;

trial = "A";

drug = "Treatment";

end;

when (0) do;

trial = "B";

drug = "placebo";

end;

otherwise;

end;

select(hearing);

when ("yes") group = 1;

when ("no") group = 2;

otherwise group = 3;

end;

select;

when (income > 100000) highincome = 1;

when (income >.) highincome = 0;

otherwise;

end;

run ...