SPSS® 12.0 Command Syntax Reference

1716 Appendix C
The loop terminates when the program encounters an empty segment, which means
that there are no more repeating data groups on a record.
• In each iteration of the loop in which an #ALL segment is not empty, DATA LIST reads
STUDENT and SCORE in a classroom record. The program begins reading these
variables in the first record, in the starting column specified by REREAD COLUMN.
For example, in the first iteration, the program reads STUDENT and SCORE beginning
in column 6. In the second iteration, the program reads STUDENT and SCORE
starting in column 14 of the same record. When all repeating groups have been read
for a record, loop processing begins on the following record.
• END CASE creates a new case for each repeating group.
• REREAD causes DATA LIST to read repeating data groups in the same record in which
it last read CLASS. Without REREAD, each execution of DATA LIST would begin on
a different record.
• LEAVE preserves the value of CLASS across the repeating data groups on a record.
Thus, the same class number is read for each student on a classroom record.
• INPUT PROGRAM signals the beginning of data definition.
• BEGIN DATA and END DATA indicate that the data are inline. The data are identical
to those in the previous example except that they do not contain a variable indicating
the number of repeating groups per record.
• These commands generate the same output as shown in Figure C.11.