Updates in the FASTCLUS Procedure
Some FASTCLUS procedure options and statements have changed from
previous versions. The differences are as follows:
- Values of the FREQ variable are no longer truncated to
integers. Noninteger variables specified in the FREQ statement
produce results different than in previous releases.
- The IMPUTE option produces different cluster standard deviations
and related statistics.
When you specify the IMPUTE option,
imputed values are no longer used in computing
cluster statistics. This change causes the cluster standard
deviations and other statistics computed from the standard deviations
to be different than in previous releases.
- The INSTAT= option reads a SAS data set previously created by the
FASTCLUS procedure using the OUTSTAT= option. If you specify the
no clustering iterations are performed and no output is
produced. Only cluster assignment and imputation are performed as
an OUT= data set is created.
- The OUTSTAT= data set contains additional information used for
imputation. _TYPE_=SEED corresponds to values that are cluster seeds.
Observations previously designated _TYPE_='SCALE' are now
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