The FREQ statement specifies one numeric variable that tells how many
belong to the cluster. If the
FREQ statement is omitted, PROC TREE looks for a variable called
specify the number of observations per cluster. If neither the FREQ
statement nor the _FREQ_ variable is present, each leaf is assumed to
represent one clustering observation,
and the frequency for each internal node is found
by summing the frequencies of its children.
- FREQ variables ;
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