Nested DO IF Structures (DO IF command)

To perform transformations involving logical tests on two variables, you can use nested DO IF—END IF structures.

• There must be an END IF command for every DO IF command in the structure.

Example

DO IF (Ethnicity EQ 5).         /*Do whites
+  DO IF (Gender EQ 2).       /*White female
+  COMPUTE Gender_Ethnicity=3.      
+  ELSE.                   /*White male
+  COMPUTE Gender_Ethnicity=1.      
+  END IF.                 /*Whites done
ELSE IF (Gender EQ 2).        /*Nonwhite female
COMPUTE Gender_Ethnicity=4.        
ELSE.                      /*Nonwhite male
COMPUTE Gender_Ethnicity=2.        
END IF.                    /*Nonwhites done

• This structure creates variable Gender_Ethnicity, which indicates both the sex and minority status of an individual.
• An optional plus sign, minus sign, or period in the first column allows you to indent commands so you can easily see the nested structures.