Hierarchical clustering

• 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*

Dendograms

• full trees
• sub trees
• upper-portion of trees
• vertical or horizontal orientation*
• branch counts*

Stopping rules

• Calinksi & Harabasz pueudo-F index
• Dua & Hart Je(2)/Je(1) index

Support tools

• generate summary and grouping varaibles
• attach notes to analyses

Similarity/dissimilarity measures for continuous data

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

Similarity/dissimilarity measures for binary data

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

Support tools

• generate summary and grouping variables
• attach notes to analyses

Result management utilities

• dir
• list
• drop
• use
• rename

User extensible

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