var1  var2 

1       1

2       2

if var1=1 and var2=1;var=1

if var1=2 and var2=1;var=2

if var1=1 and var2=2;var=3 

if var1=2 and var2=2;var=4

用comp的if命令或者重新编码命令都可

[此贴子已经被作者于2008-1-19 14:59:09编辑过]

Example

IF (AGE > 20 AND SEX = 1) GROUP=2.
• The numeric variable GROUP is set to 2 for cases where AGE is greater than 20 and SEX
is equal to 1.

• When the expression is false or missing, the value of GROUP remains unchanged. If
GROUP has not been previously defined, it contains the system-missing value.