Initially, each variable is considered as a separate cluster, then the two most similar variables are joined to form a cluster. The amalgamating process continues in a stepwise fashion until a single cluster is formed that contains all variables.
Input can be data or a matrix with measures of association or distance.
Use for BMDP File input. Parameter must be the same as that stated when the file was created. Specify a variable containing the case frequency. A case frequency has the effect of repeating cases. Specify a case weight variable.