title: Generalized centroid estimators in bioinformatics.
abstract: In a number of estimation problems in bioinformatics, accuracy measures of the target problem are usually given, and it is important to design estimators that are suitable to those accuracy measures. However, there is often a discrepancy between an employed estimator and a given accuracy measure of the problem. In this study, we introduce a general class of efficient estimators for estimation problems on high-dimensional binary spaces, which represent many fundamental problems in bioinformatics. Theoretical analysis reveals that the proposed estimators generally fit with commonly-used accuracy measures (e.g. sensitivity, PPV, MCC and F-score) as well as it can be computed efficiently in many cases, and cover a wide range of problems in bioinformatics from the viewpoint of the principle of maximum expected accuracy (MEA). It is also shown that some important algorithms in bioinformatics can be interpreted in a unified manner. Not only the concept presented in this paper gives a useful framework to design MEA-based estimators but also it is highly extendable and sheds new light on many problems in bioinformatics.
authors.affiliation: Graduate School of Frontier Sciences, The University of Tokyo, Chiba, Japan. mhamada@k.u-tokyo.ac.jp
authors.forename: Michiaki
authors.initials: M
authors.lastname: Hamada
authors.forename: Hisanori
authors.initials: H
authors.lastname: Kiryu
authors.forename: Wataru
authors.initials: W
authors.lastname: Iwasaki
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Asai
mesh_terms: D000465:Algorithms; D000818:Animals; D001499:Bayes Theorem; D019295:Computational Biology / Q000379:methods* / Q000706:statistics & numerical data; D006801:Humans; D016013:Likelihood Functions; D008962:Models, Theoretical; D009690:Nucleic Acid Conformation; D012313:RNA / Q000737:chemistry / Q000235:genetics; D016415:Sequence Alignment / Q000379:methods / Q000706:statistics & numerical data; D017423:Sequence Analysis, RNA / Q000379:methods / Q000706:statistics & numerical data; D013223:Statistics as Topic / Q000379:methods* / Q000592:standards
chemical_list: D012313:RNA