Similarity Measure - function that quantifies similarity Dissimilarity Measure - numerical measure of how different two objects are ( or )
Data Matrix
Characteristics in Data Characteristics describe single attributes, dissimilarity matrix uses multiple attributes
Data Matrix
Dissimilarity Matrix
Object by Object structure
Stores dissimilarity for all pairs of objects
Dissimilarity is distance
Usually symmetric (thus a triangular matrix)
Distance function are different for real, boolean, categorical, ordinal, ratio and vector
Distance Functions: Quantitative:
Nominal:
Ordinal:
Ratio-Scaled:
