Encyclopedia of Database Systems

2018 Edition
| Editors: Ling Liu, M. Tamer Özsu

Average R-Precision

  • Steven M. BeitzelEmail author
  • Eric C. JensenEmail author
  • Ophir FriederEmail author
Reference work entry
DOI: https://doi.org/10.1007/978-1-4614-8265-9_491


The Average R-precision is the arithmetic mean of the R-precision values for an information retrieval system over a set of n query topics. It can be expressed as follows:
$$ \mathrm{A}\mathrm{R}\mathrm{P}=\frac{1}{n}{\displaystyle \sum_n{\mathrm{RP}}_n} $$
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Recommended Reading

  1. 1.
    National Institute of Standards and Technology. TREC-2004 common evaluation measures. Available online at: http://trec.nist.gov/pubs/trec14/appendices/CE.MEASURES05.pdf. 2005. Retrieved on 27 Aug 2007.

Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Telcordia TechnologiesPiscatawayUSA
  2. 2.Twitter, Inc.San FranciscoUSA
  3. 3.Georgetown UniversityWashingtonUSA

Section editors and affiliations

  • Weiyi Meng
    • 1
  1. 1.Dept. of Computer ScienceState University of New York at BinghamtonBinghamtonUSA