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Appendix A: Special SAS Data Sets > Special SAS Data Sets - Pg. 7610

7610 ! Appendix A: Special SAS Data Sets Figure A.5 A TYPE=SSCP Data Set Produced by PROC REG Five Socioeconomic Variables Obs 1 2 3 4 5 6 7 _TYPE_ SSCP SSCP SSCP SSCP SSCP SSCP N _NAME_ Intercept Pop School Employ Services House Intercept 12.0 74900.0 137.3 28000.0 1450.0 204000.0 12.0 Pop 74900 597670000 857640 220440000 10959000 1278700000 12 School 137.30 857640.00 1606.05 324130.00 18152.00 2442100.00 12.00 Employ 28000 220440000 324130 82280000 4191000 486600000 12 Services 1450 10959000 18152 4191000 320500 30910000 12 House 204000 1278700000 2442100 486600000 30910000 3914000000 12 TYPE=TREE Data Sets Some clustering procedures produce TYPE=TREE data sets. For example, in PROC CLUSTER, a TYPE=TREE data set contains one observation for each observation in the input data set, plus one observation for each cluster of two or more observations (that is, one observation for each node of the cluster tree). The total number of output observations is usually 2n 1, where n is the number of input observations. The density methods might produce fewer output observations when the number of clusters cannot be reduced to one. In PROC VARCLUS, the OUTTREE= data set contains one observation for each variable clustered plus one observation for each cluster of two or more variables--that is, one observation for each node of the cluster tree. The total number of output observations is between n and 2n 1, where n is the number of variables clustered. See Chapter 29, "The CLUSTER Procedure," and Chapter 93, "The VARCLUS Procedure," for details. TYPE=UCORR Data Sets A TYPE=UCORR data set is almost identical to a TYPE=CORR data set, except that the correla- tions are uncorrected for the mean. The corresponding value of the _TYPE_ variable is 'UCORR' instead of 'CORR'. Uncorrected standard deviations are in observations with _TYPE_ ='USTD'. A TYPE=UCORR data set can be used as input for every SAS/STAT procedure that uses a TYPE=CORR data set, except for the CANDISC, DISCRIM, and STEPDISC procedures. TYPE=UCORR data sets can be created by the CALIS, CANCORR, PRINCOMP, and VARCLUS procedures.