DO IF

   END IF应用：

例1、*if_doif1.sps.
DATA LIST FREE /var1.
BEGIN DATA
1 2 3 4
END DATA.
COMPUTE newvar1=(var1<3).
IF (var1<3) newvar2=1.
IF (var1>=3) newvar2=0.
DO IF var1<3.
- COMPUTE newvar3=1.
ELSE.
- COMPUTE newvar3=0.
END IF.
EXECUTE.

例2、*if_doif2.sps
DATA LIST FREE /var1 var2.
BEGIN DATA
1 1
2 1
END DATA.
IF (var1=1) newvar1=1.
IF (var2=1) newvar1=2.
DO IF var1=1.
- COMPUTE newvar2=1.
ELSE IF var2=1.
- COMPUTE newvar2=2.
END IF.
EXECUTE.