•The CALL SYMPUT routine initializes the macro variable STUDY with the string
value "CLASS data set." The macro variable only needs to be initialized once, so the
IF statement limits the initialization to the first observation (_N_ = 1).
•The DYNAMIC= suboption initializes the dynamic variables XVAR and YVAR.
XVAR is assigned to the input variable HEIGHT, and YVAR is assigned to the input
variable WEIGHT.
For a more complete discussion of this topic and additional examples, see Chapter 26,
“Using Dynamics and Macro Variables ...
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