A cluster is defined by its center vector or by statistics. A center vector is implemented by a NUM-ARRAY. Each
Partition corresponds to a cluster and holds field statistics to describe it. The definition of a cluster may
contain a center vector as well as statistics. The attribute modelClass in the ClusteringModel defines which one is
used to actually define the cluster.
A cluster is defined by its center vector or by statistics. A center vector is implemented by a NUM-ARRAY. Each Partition corresponds to a cluster and holds field statistics to describe it. The definition of a cluster may contain a center vector as well as statistics. The attribute modelClass in the ClusteringModel defines which one is used to actually define the cluster.