* Subsets.
* Selected (conditional) observations.

* SELECT IF .
get file='y:\spss\data\1991 U.S. General Social Survey.sav'.
dataset name DataSet1.
descriptives variables=age.

select if region=1.
descriptives variables=age.

get file='y:\spss\data\1991 U.S. General Social Survey.sav'.
dataset name DataSet1.
temporary.
* For one pass through the data set.
select if region=1.
descriptives variables=age.
descriptives variables=age.

temporary.
select if sex = 1.
save outfile="U:\men.sav".
temporary.
select if sex = 2.
save outfile="U:\women.sav".

* Filtering.
get file="Y:\SPSS\data\Employee data.sav".
dataset name DataSet1.
filter by prevexp.
* filters by 0 (zero).
frequencies variables=jobcat.

filter by minority.
frequencies variables=jobcat.

filter off.

* Filter by a variable, NOT a logical condition.
filter by (prevexp or minority).
* Produces an error.
frequencies variables=jobcat.

compute flag = 1.
if (prevexp = 0 or minority = 0) flag = 0.
execute.
* check the filter variable.
crosstabs minority prevexp by flag.

filter by flag.

* notice that filtering affects statistics, not computes.
compute newvar = 1.
frequencies variables=newvar.
filter off.
frequencies variables=newvar.