Density Ratio Estimation R package densratio version 0.3.1 CRAN Task View: AnomalyDetection (https://CRAN.R-project.org/view=AnomalyDetection) Density ratio estimation. The estimated density ratio function can be used in many applications such as anomaly detection, change-point detection, covariate shift adaptation. The implemented methods are uLSIF (Hido et al. (2011) <doi:10.1007/s10115-010-0283-2>), RuLSIF (Yamada et al. (2011) <doi:10.1162/NECO_a_00442>), and KLIEP (Sugiyama et al. (2007) <doi:10.1007/s10463-008-0197-x>). Software Imports: utils Suggests: graphics, knitr, mvtnorm, rmarkdown, stats, testthat Koji Makiyama <hoxo.smile@gmail.com> Comprehensive R Archive Network (CRAN) Koji Makiyama [aut, cre] MIT + file LICENSE (https://CRAN.R-project.org/package=densratio/LICENSE) 2026-04-29 application/tgz https://CRAN.R-project.org/package=densratio doi:10.32614/CRAN.package.densratio