Adding new cases using syntax

*The easiest way is to define your new variable with data list and then add your old file to it. It would look like this:

DATA LIST /NEWVAR 1.
BEGIN DATA
1
END DATA.

ADD FILES FILE=*
 /FILE=OLDFILE.

********************************************************************.

* var1 (a unique id variable) has gaps in it (1 2 3 . 5 6 . 8 . 10 11); values 4,7,9,and 12 are missing.
* Task is to fill the gaps.
* rlevesque@videotron.ca.

data list free / var1 dummy.
begin data
1 8 2 22 
3 7 5 7 
6 7 8 7 
10 7 11 7
end data .

DO IF $casenum=1.
+ LOOP varx=1 TO 12.
+ XSAVE OUTFILE='temp.sav' /KEEP=varx.
+ END LOOP.
END IF.
EXECUTE.

MATCH FILES FILE=* /DROP=varx.
MATCH FILES FILE=* /FILE='temp.sav' /RENAME= (varx=var1) /BY var1.
EXECUTE.