4.6.2 Variables Automatically Defined by PSPP

There are seven system variables. These are not like ordinary variables because system variables are not always stored. They can be used only in expressions. These system variables, whose values and output formats cannot be modified, are described below.

$CASENUM

Case number of the case at the moment. This changes as cases are shuffled around.

$DATE

Date the PSPP process was started, in format A9, following the pattern DD MMM YY.

$JDATE

Number of days between 15 Oct 1582 and the time the PSPP process was started.

$LENGTH

Page length, in lines, in format F11.

$SYSMIS

System missing value, in format F1.

$TIME

Number of seconds between midnight 14 Oct 1582 and the time the active file was read, in format F20.

$WIDTH

Page width, in characters, in format F3.