clusterCrit (version 1.2.1)

concordance: Compute Concordance Matrix

Description

concordance calculates the concordance matrix between two partitions of the same data.

Usage

concordance(part1, part2)

Arguments

part1

[vector] : the first partition vector.

part2

[vector] : the second partition vector.

Value

• A 2x2 matrix of the form : | P1 | P2 | ____________________ P1 | Nyy | Nyn | P2 | Nny | Nnn | ____________________ where
  • Nyyis the number of points belonging to the same cluster both inpart1andpart2
  • Nynis the number of points belonging to the same cluster inpart1but not inpart2
  • Nnyis the number of points belonging to the same cluster inpart2but not inpart1
  • Nnnis the number of pointsnotbelonging to the same cluster both inpart1andpart2

Author

Bernard Desgraupes [e-mail] University of Paris Ouest - Nanterre Lab Modal'X (EA 3454)

Details

Given two partitions, the function concordance calculates the number of pairs classified as belonging or not belonging to the same cluster with respect to partitions part1 or part2.

See Also

extCriteria, intCriteria.

Examples

# Generate two artificial partitions
part1<-sample(1:3,150,replace=TRUE)
part2<-sample(1:5,150,replace=TRUE)

# Compute the table of concordances and discordances
concordance(part1,part2)