User Guide

214
Chapter 10
To generate date variables for time series data:
E From the menus choose:
Data
Define Dates...
Unselected Cases
You can choose one of the following alternatives for the treatment of unselected cases:
 Filtered. Unselected cases are not included in the analysis but remain in the data
file. You ca
n use the unselected cases later in the session if you turn filtering
off. If you select a random sample or if you select cases based on a conditional
expression, this generates a variable named filter_$ with a value of 1 for selected
cases and a
value of 0 for unselected cases.
 Deleted.
Unselected cases are deleted from the data file. By reducing the number
of cases in the open data file, you can save processing time. Deleted cases can
be recovered only by exiting from the file without saving any changes and then
reopening
the file. The deletion of cases is permanent if you save the changes
to the data file. Note: If you delete unselected cases and save the file, the cases
cannot be recovered.
Case Sele
ction Status
If you hav
e selected a subset of cases but have not discarded unselected cases,
unselected cases are marked in the Data Editor with a diagonal line through the
row number.