DISTANCE Subcommand (TWOSTEP CLUSTER command)

The distance subcommand determines how distances will be computed between clusters.

EUCLIDEAN. Use the Euclidean distance to compute distances between clusters. You may select Euclidean distance if all variables are continuous. TWOSTEP CLUSTER will return a syntax error if you specify Euclidean distance with non-numeric variables.

LIKELIHOOD. Use the minus log-likelihood to compute distances between clusters. This is the default. The likelihood function is computed assuming all variables are independent. Continuous variables are assumed to be normally distributed, and categorical variables are assumed to be multinomially distributed.