Computes the Rand index, a measure of the similarity between two clusterings.
randIndex(tab, adjust = TRUE)
a matrix giving the cross-tabulation table of two clusterings.
logical: should the "adjusted" version be computed?
the Rand index of the input table.
W. M. Rand (1971). "Objective criteria for the evaluation of clustering methods". Journal of the American Statistical Association 66: 846-850