I already have a distance matrix (1609*1609) and each distance is between 0~1. I want to cluster 1609 items into natural groups by using Twostep cluster in SPSS. I want to use the distance matrix as input for Twostep cluster analysis. How to modify the syntax to do that? Or I cannot do it?
Thanks in advance.
DATASET ACTIVATE dataname1. TWOSTEP CLUSTER /CATEGORICAL VARIABLES=ROWTYPE VARNAME /CONTINUOUS VARIABLES=A1 to A1609 *Ignore the A2 to A1608 here. /DISTANCE LIKELIHOOD /NUMCLUSTERS AUTO 15 BIC /HANDLENOISE 0 /MEMALLOCATE 64 /CRITERIA INITHRESHOLD(0) MXBRANCH(8) MXLEVEL(3) /VIEWMODEL DISPLAY=YES /SAVE VARIABLE=TSC_4920.