twTStats {CoCiteStats} | R Documentation |
For two way tables based on co-citations we use three different test statistic, the Concordance, the Jaccard index and Hubert's Gamma.
twTStats(twT)
twT |
A two way table, as produced by twowayTable . |
The Conordance is simply the n11 entry. The Jaccard index is the n11 entry divided by the sum of n11, n12, and n21. Hubert's Gamma is slightly more complicated.
Concordance |
The concordance statistic. |
Jaccard |
The Jaccard index. |
Hubert |
Hubert's Gamma |
R. Gentleman
Testing Gene Associations Using Co-citation, by B. Ding and R. Gentleman. Bioconductor Technical Report, 2004
tw1 = twowayTable("10", "101", FALSE) twTStats(tw1)