Making ordinal information.

Description

For a given dissimilarity matrix Xi=(xi_{ij})_{n x n}, creating the ordinal information matrix whose row vectors are ordinal quadruples of indices: a row vector (i,j,k,l) means xi_{ij}<xi_{kl}.

Usage

get.order(DM)

Arguments

Value

The matrix whose row vectors are ordinal quadruples of indices: a row vector (i,j,k,l) means xi_{ij}<xi_{kl}.

Author(s)

Yoshikazu Terada

Examples

data(eurodist)
OIF <- get.order(as.matrix(eurodist))