SPSS® 12.0 Command Syntax Reference

1482 SELECT IF
Example
Example
Example
SELECT IF ((V1-15) LE (V2*(-0.001))).
• The logical expression compares whether V1 minus 15 is less than or equal to V2 multiplied
by −0.001. If it is, the case is selected.
SELECT IF ((YRMODA(88,13,0) - YRMODA(YVAR,MVAR,DVAR)) LE 30).
• The logical expression subtracts the number of days representing the date (YVAR, MVAR,
and DVAR) from the number of days representing the last day in 1988. If the difference is
less than or equal to 30, the case is selected.
* Creating a sequence number.
COMPUTE #CASESEQ=#CASESEQ+1.
SELECT IF (MOD(#CASESEQ,2)=0).
• This example computes a scratch variable, #CASESEQ, containing the sequence numbers
for each case. Every other case beginning with the second is selected.
• #CASESEQ must be a scratch variable so that it is not reinitialized for every case. An alternative
is to use the LEAVE command.
Example
DO IF SEX EQ ’M’.
+ SELECT IF PRESTIGE GT 50.
ELSE IF SEX EQ ’F’.
+ SELECT IF PRESTIGE GT 45.
END IF.
• The SELECT IF commands within the DO IF structure select males with prestige scores
above 50 and females with prestige scores above 45.