Changes and Enhancements to SAS/STAT Software in V7 and V8

FASTCLUS Procedure

In the FREQ statement, frequencies are no longer truncated to integers.

When the IMPUTE option is specified in the PROC FASTCLUS statement, 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 new INSTAT= option reads a SAS data set previously created by the FASTCLUS procedure using the OUTSTAT= option. If you specify the INSTAT= option, no clustering iterations are performed and no output is displayed. Only cluster assignment and imputation are performed as an OUT= data set is created.

The OUTSTAT= data set also contains the cluster seeds, and observations that were previously designated _TYPE_=`SCALE' are now _TYPE_=`DISPERSION'.

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