Description Usage Arguments Details Value Author(s) References
This function computes several partition comparison indices.
1 | pci(x1, x2)
|
x1 |
a factor |
x2 |
a factor |
This function computes indices of similarity between two factors representing the cluster partition of n items. The two vectors must be of the same length. Let n11 be the number of item pairs that occur in the same cluster in both partitions x1
and x2
, n00 the number of item pairs that occur in differenct clusters in both partitions, n10 the number of item pairs that occur in the same cluster in partition x1
but in different clusters in parition x2
, and n01 the number of item pairs that occur in different clusters in partition x1
but in the same cluster in partition x2
. The Rand index is given by
(n11+n00)/(n11+n00+n01+n10).
The Fowlkes and Mallows index is given by
n11/sqrt((n11+n10)*(n11+n01)).
The Wallace indices are respectively given by
n11/(n11+n10), and n11/(n11+n01).
The Jaccard index is given by
n11/(n11+n01+n10).
A named vector with the following elements:
R |
Rand index |
FM |
Fowlkes and Mallows index |
W10 |
Wallace 10 index |
W01 |
Wallace 01 index |
J |
Jaccard index |
Matt Shotwell
Matthew S. Shotwell (2013). profdpm: An R Package for MAP Estimation in a Class of Conjugate Product Partition Models. Journal of Statistical Software, 53(8), 1-18. URL http://www.jstatsoft.org/v53/i08/.
Rand, W. (1971) Objective Criteria for the Evaluation of Clustering Methods. Journal of the American Statistical Association 66:846-850
Fowlkes, E. B. and Mallows, C. L. (1983) A Method for Comparing Two Hierarchical Clusterings. Journal of the American Statistical Association 78:553-569
Wallace, D. L. (1983) A Method for Comparing Two Hierarchical Clusterings: comment. Journal of the American Statistical Association 78:569-576
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