This is an updated version of the Rank Biased Precision evaluation metric originally described in: Moffat, A. and Zobel, J., 2008. Rank-biased precision for measurement of retrieval effectiveness. ACM Transactions on Information Systems (TOIS), 27(1), p-2. DOI http://doi.acm.org/10.1145/1416950.1416952
The original source code which may no longer compile can be found at: https://people.eng.unimelb.edu.au/ammoffat/rbp_eval-0.2.tar.gz.
The original C/C++ implementation of this metric and the accompanying tools was written by William Webber.
Current version is 1.0.