densratio

0.3.1

Density Ratio Estimation

4packages depend

5Kdownloads / year

41.6%test coverage

13/13checks pass

Overview

About

Maintained by Koji MakiyamaFirst published 2016-03-294 releasesCRAN page ↗GitHub ↗

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).

Install

R (CRAN)pak (dev)Ubuntu (r2u)Fedora (COPR)openSUSE (OBS)

install.packages("densratio", repos = "https://cloud.r-project.org/")

Installs the current CRAN release. Prebuilt binaries on Windows and macOS.

if (!requireNamespace("pak", quietly = TRUE))
  install.packages("pak", repos = "https://cloud.r-project.org/")
pak::pak("hoxo-m/densratio")

Development version from hoxo-m/densratio. Installs pak first if it is not already available.

Release

# enable cranapt (r2u) if it is not already set up, then install
grep -rqs r2u.stat.illinois.edu /etc/apt/sources.list /etc/apt/sources.list.d/ \
  || curl -fsSL https://raw.githubusercontent.com/eddelbuettel/r2u/master/inst/scripts/add_cranapt_noble.sh | sudo bash
sudo apt install -y r-cran-densratio

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled.

bspm (used by r2u) also needs make: sudo apt install make

# enable the iucar/cran COPR if it is not already present, then install
ls /etc/yum.repos.d/*iucar*cran*.repo >/dev/null 2>&1 \
  || sudo dnf copr enable -y iucar/cran
sudo dnf install -y R-CRAN-densratio

RPMs from the iucar/cran COPR, rebuilt from CRAN.

For install.packages() integration in R, also: sudo dnf install R-CoprManager

# add the autoCRAN OBS repo (Tumbleweed) if it is missing, then install
zypper -q lr | grep -qi autoCRAN \
  || sudo zypper addrepo https://download.opensuse.org/repositories/devel:/languages:/R:/autoCRAN/openSUSE_Tumbleweed/devel:languages:R:autoCRAN.repo
sudo zypper install -y R-densratio

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed).

Health

CRAN checks

13OK

Slowest check: 1.5 min · r-oldrel-macos-x86_64

Code health

Yes

Tests · ratio 0.31

41.6%

Coverage · measured lines

100%

Documentation · exports

Dependencies · direct

Check history

OK2026-06-09
13 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
NOTE2026-06-08
12 OK · 1 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE
OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

READMEYes · 1,035 wordsVignettesYes · dynamicpkgdown siteNoNEWSYes · 100% structuredCode of conductNoContributing guideNo

Examples that run: 100%
Documented parameters: 93%
Return-value docs: 100%
References docs: 0%

Downloads

CRAN downloads in the past year

Rank #5,400 · ~14/day · ~419/mo

Releases R versions

Daily download trend is not available in this view yet.

39730 days

1.7K90 days

5K1 year

Compare downloads with other packages →

Also on132 r2u24 autocran

Repository

GitHub ↗ hoxo-m/densratio

23Stars

8Forks

5Open issues

2Open PRs

3Releases

75Commits

1Contributors

r-packagestatisticsmachine-learninganomaly-detection

75 commits · Last activity 2026-05-01 · 0% stars, 30d

Stars over time

2022-12-15 · 212026-07-07 · 23

Repository practices

Upstream repositoryBeta

5 development-tooling and community-health practices detected across 4 families in the upstream repository

Checks run against github.com/hoxo-m/densratio on 2026-07-30.

Continuous integration (2)

GitHub ActionsTravis CI

CRAN release process (1)

cran-comments.md

Docs source (1)

README.Rmd

Lint, format, editor (1)

RStudio project

How this is detected·Detection ruleset v1 (2026-07-18)

Dependencies

Declared dependencies

4 external dependencies (excludes base and recommended)

Depends (0)

none

Imports (1)

utils

LinkingTo (0)

none

Suggests (6)

graphicsknitr mvtnorm rmarkdownstatstestthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

4direct

0indirect

APPEstimation S4DM flexCausal DataSimilarity

Code & Tests

People & History

People (1)

Maintainer (1)

Koji Makiyama

Author, Maintainer

Authors (1)

Koji Makiyama

Author, Maintainer

Package Timeline

4 releases. Pick two to compare their code metrics. R releases are shown for context.

0.3.1Latest
2026-04-29 · current release · diff ↗
R
R 4.6.0 released · 2026-04-24
R
R 4.5.0 released · 2025-04-11
R
R 4.4.0 released · 2024-04-24
R
R 4.3.0 released · 2023-04-21
R
R 4.2.0 released · 2022-04-22
R
R 4.1.0 released · 2021-05-18
R
R 4.0.0 released · 2020-04-24
0.2.1
2019-06-30 · diff ↗
0.1.1
2019-05-09 · diff ↗
R
R 3.6.0 released · 2019-04-26
R
R 3.5.0 released · 2018-04-23
R
R 3.4.0 released · 2017-04-21
R
R 3.3.0 released · 2016-05-03
0.0.3
2016-03-29
R
R 3.2.0 released · 2015-04-16

Package metadata

First published: 2016-03-29
Total releases: 4 / 10 yrs
License: MIT + file LICENSE OSI
Download size: 200 KB
Installed size: not tracked yet
With dependencies: not tracked yet

Appears in task views

Anomaly Detection

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