wallaceI {partitionComparison}

Wallace I

Description

Compute Wallace' index I

\frac{N_{11}}{N_{21}}

Usage

wallaceI(p, q)

## S4 method for signature 'Partition,Partition'
wallaceI(p, q)

## S4 method for signature 'PairCoefficients,missing'
wallaceI(p, q = NULL)

Arguments

p

The partition P or an instance of PairCoefficients

q

The partition Q or NULL

Methods (by class)

• wallaceI(p = Partition, q = Partition): Compute given two partitions

• wallaceI(p = PairCoefficients, q = missing): Compute given the pair coefficients

Author(s)

Fabian Ball [e-mail]

References

Wallace DL (1983). “A Method for Comparing Two Hierarchical Clusterings: Comment.” Journal of the American Statistical Association, 78(383), 569–576.

See Also

folwkesMallowsIndex

Examples

isTRUE(all.equal(wallaceI(new("Partition", c(0, 0, 0, 1, 1)), 
                          new("Partition", c(0, 0, 1, 1, 1))), 0.5))