MARK Subcommand (CASEPLOT command)
Use MARK
to
indicate the onset of an intervention variable.
- The onset date is indicated by a horizontal reference line.
- The specification on
MARK
can be either a variable name or an onset date if the DATE_ variable exists. - If a variable is named, the reference line indicates where the values of that variable change.
- A date specification follows the same format as the
DATE
command—that is, a keyword followed by a value. For example, the specification for June, 1955, isY 1955 M 6
(orY 55 M 6
if only the last two digits of the year are used onDATE
).
