Implementing the Rank-Rank Hypergeometric overlap test. This version is obsolete. An updated one is available at: http://www.bioconductor.org/packages/release/bioc/html/RRHO.html
library(devtools)
install_github("RRHO", "johnros", subdir='RRHO')
library(RRHO)
Plaisier, Seema B., Richard Taschereau, Justin A. Wong, and Thomas G. Graeber. 2010. “Rank–rank Hypergeometric Overlap: Identification of Statistically Significant Overlap Between Gene-expression Signatures.” Nucleic Acids Research 38 (17) (September 1): e169–e169. doi:10.1093/nar/gkq636.