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.
Code:
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.