Package: densityratio
Type: Package
Title: Distribution Comparison Through Density Ratio Estimation
Version: 0.2.3
Authors@R: c(
    person("Thom", "Volker", 
    email = "thombenjaminvolker@gmail.com", 
    role = c("aut", "cre"),
           comment = c(ORCID = "0000-0002-2408-7820")),
    person("Carlos", "Gonzalez Poses", role = "ctb"), 
    person("Erik-Jan", "van Kesteren", role = "ctb"))
Description: Fast, flexible and user-friendly tools for distribution
        comparison through direct density ratio estimation. The
        estimated density ratio can be used for covariate shift
        adjustment, outlier-detection, change-point detection,
        classification and evaluation of synthetic data quality. The
        package implements multiple non-parametric estimation
        techniques (unconstrained least-squares importance fitting,
        ulsif(), Kullback-Leibler importance estimation procedure,
        kliep(), spectral density ratio estimation, spectral(), kernel
        mean matching, kmm(), and least-squares hetero-distributional
        subspace search, lhss()). with automatic tuning of
        hyperparameters. Helper functions are available for two-sample
        testing and visualizing the density ratios. For an overview on
        density ratio estimation, see Sugiyama et al. (2012)
        <doi:10.1017/CBO9781139035613> for a general overview, and the
        help files for references on the specific estimation
        techniques.
License: GPL (>= 3)
Encoding: UTF-8
LazyData: true
Imports: osqp, Rcpp, pbapply, ggplot2, ggh4x
LinkingTo: Rcpp, RcppArmadillo, RcppProgress
Suggests: RcppArmadillo, knitr, rmarkdown, testthat (>= 3.0.0)
Config/testthat/edition: 3
Depends: R (>= 2.10)
RoxygenNote: 7.3.3
VignetteBuilder: knitr
URL: https://thomvolker.github.io/densityratio/,
        https://github.com/thomvolker/densityratio
BugReports: https://github.com/thomvolker/densityratio/issues
NeedsCompilation: yes
Packaged: 2026-11-03 13:14:01 UTC; root
Author: Thom Volker [aut, cre] (ORCID:
        <https://orcid.org/0000-0002-2408-7820>), Carlos Gonzalez Poses
        [ctb], Erik-Jan van Kesteren [ctb]
Maintainer: Thom Volker <thombenjaminvolker@gmail.com>
Repository: https://cran.r-universe.dev
Date/Publication: 2026-07-14 15:05:51 UTC
RemoteUrl: https://github.com/cran/densityratio
RemoteRef: HEAD
RemoteSha: 1d8aa62003b4847b2eddff2c6ec7d4394d318ef0