RandIndex function

Rand Index between partitions

Computes the Rand Index and the Adjusted Rand Index between two partitions

RandIndex(Partition1, Partition2)

Arguments

• Partition1: Vector describing the first partition
• Partition2: Vector describing the second partition

Details

Supports incomplete partitions (value 0 is coding for missing stimulus)

Returns

List of following components: - Rand: Rand Index between the partitions

• AdjustedRand: Adjusted rand Index between the partitions

References

Rand (1971) Jasa, 66, 846-850

Hubert & Arabie (1985) J. of Classification, 2, 193-218

Examples

Partition1<-c(1,1,1,2,2,2)
  Partition2<-c(1,1,2,2,2,3)
  r<-RandIndex(Partition1,Partition2)
  r
  # $Rand
  # [1] 0.6
  # $AdjustedRand
  # [1] 0.1176471