{ "_id": "6a1bf0e81d7bb097a0a230cd", "Package": "densityratio", "Type": "Package", "Title": "Distribution Comparison Through Density Ratio Estimation", "Version": "0.2.2.9000", "Authors@R": "c(\nperson(\"Thom\", \"Volker\",\nemail = \"thombenjaminvolker@gmail.com\",\nrole = c(\"aut\", \"cre\"),\ncomment = c(ORCID = \"0000-0002-2408-7820\")),\nperson(\"Carlos\", \"Gonzalez Poses\", role = \"ctb\"),\nperson(\"Erik-Jan\", \"van Kesteren\", role = \"ctb\"))", "Description": "Fast, flexible and user-friendly tools for distribution\ncomparison through direct density ratio estimation. The\nestimated density ratio can be used for covariate shift\nadjustment, outlier-detection, change-point detection,\nclassification and evaluation of synthetic data quality. The\npackage implements multiple non-parametric estimation\ntechniques (unconstrained least-squares importance fitting,\nulsif(), Kullback-Leibler importance estimation procedure,\nkliep(), spectral density ratio estimation, spectral(), kernel\nmean matching, kmm(), and least-squares hetero-distributional\nsubspace search, lhss()). with automatic tuning of\nhyperparameters. Helper functions are available for two-sample\ntesting and visualizing the density ratios. For an overview on\ndensity ratio estimation, see Sugiyama et al. (2012)\n for a general overview, and the\nhelp files for references on the specific estimation\ntechniques.", "License": "GPL (>= 3)", "Encoding": "UTF-8", "LazyData": "true", "Config/testthat/edition": "3", "Config/testthat/parallel": "true", "Roxygen": "list(markdown = TRUE)", "RoxygenNote": "7.3.2", "VignetteBuilder": "knitr", "URL": "https://thomvolker.github.io/densityratio/,\nhttps://github.com/thomvolker/densityratio", "BugReports": "https://github.com/thomvolker/densityratio/issues", "Config/pak/sysreqs": "make", "Repository": "https://thomvolker.r-universe.dev", "Date/Publication": "2025-08-04 12:14:50 UTC", "RemoteUrl": "https://github.com/thomvolker/densityratio", "RemoteRef": "HEAD", "RemoteSha": "9f18395d2b277a3e4346026716da75f27a60a700", "NeedsCompilation": "yes", "Packaged": { "Date": "2026-05-31 08:15:30 UTC", "User": "root" }, "Author": "Thom Volker [aut, cre] (ORCID: ),\nCarlos Gonzalez Poses [ctb],\nErik-Jan van Kesteren [ctb]", "Maintainer": "Thom Volker ", 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