Cluster analysis

• single linkage
• complete linkage
• average linkage
• Ward's linkage (including Ward's method)
• weighted average linkage
• centroid linkage
• median linkage

Nonhierarchical

• kmeans
• kmedians

Cluster on observations

Cluster using any proximity matrix

Dendrograms

• full trees
• subtrees
• upper portion of tree
• vertical or horizontal orientation
• branch counts

Stopping rules

• Calínski and Harabasz pseudo-F index
• Duda and Hart Je(2)/Je(1) index

Support tools

• generate summary and grouping variables
• attach notes to analyses

Similarity/dissimilarity measures for continuous data

• L2/Euclidean
• L1/absolute/cityblock/manhattan
• L(#)
• Canberra
• correlation
• angular

• matching
• Jaccard
• Russell
• Hamann
• Dice
• antidice
• Sneath
• Rogers
• Ochiai
• Yule
• Anderberg
• Kulczynski
• Gower2
• Pearson

Result-management utilities

• dir
• list
• drop
• use
• rename

User-extensible commands

• ability to add new clustering methods and utilities
• full set of tools to ease making additions