Compute Concordance Matrix
concordance calculates the concordance matrix between two partitions
of the same data.
concordance(part1, part2)
part1 |
|
part2 |
|
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.
A 2x2 matrix of the form :
| P1 | P2 | ____________________ P1 | Nyy | Nyn | P2 | Nny | Nnn | ____________________
where
Nyy is the number of points belonging to the same cluster both in part1 and part2
Nyn is the number of points belonging to the same cluster in part1 but not in part2
Nny is the number of points belonging to the same cluster in part2 but not in part1
Nnn is the number of points not belonging to the same cluster both in part1 and part2
Bernard Desgraupes
bernard.desgraupes@u-paris10.fr
University of Paris Ouest - Nanterre
Lab Modal'X (EA 3454)
# 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)
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