Simple classes to represent proximity matrices. For compatibility with
clustering functions in R, we represent dissimilarities as the
S3 class dist. For cross-dissimilarities and similarities, we
provide the S4 classes ar_cross_dissimilarities and
ar_similarities.
dist objects are the result of calling the method
dissimilarity with one argument or any R function
returning a S3 dist object.
ar_cross_dissimilarity objects are the result of calling the method
dissimilarity with two arguments, by calls of the form
new("similarity", ...), or by coercion from matrix.
ar_similarity objects are the result of calling the method
affinity, by calls of the form new("similarity", ...),
or by coercion from matrix.
The S4 classes have a method slot which contains the
type of measure used for calculation.
dist (in package stats),
dissimilarity,
affinity.