lookout

2.0.2

Leave One Out Kernel Density Estimates for Outlier Detection

1packages depend

5.7Kdownloads / year

48.1%test coverage

10/13checks pass

Overview

About

Maintained by Sevvandi KandanaarachchiFirst published 2021-02-127 releasesCRAN page ↗GitHub ↗

Outlier detection using leave-one-out kernel density estimates and extreme value theory. The bandwidth for kernel density estimates is computed using persistent homology, a technique in topological data analysis. Using peak-over-threshold method, a generalized Pareto distribution is fitted to the log of leave-one-out kde values to identify outliers.

Install

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

install.packages("lookout", 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("sevvandi/lookout")

Development version from sevvandi/lookout. 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-lookout

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

# 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-lookout

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

Health

CRAN checks

3ERROR10OK

Failing flavors

ERROR r-devel-linux-x86_64-debian-clang
ERROR r-oldrel-windows-x86_64
ERROR r-release-linux-x86_64

Slowest check: 2.8 min · r-oldrel-macos-x86_64

Check history

ERROR2026-07-17
11 OK · 0 NOTE · 0 WARNING · 2 ERROR · 0 FAILURE
OK2026-03-10
14 OK · 0 NOTE · 0 WARNING · 0 ERROR · 0 FAILURE

Documentation

Documentation signals are not tracked yet for this package.

Downloads

5.7K

CRAN downloads in the past year

Rank #5,763 · ~16/day · ~473/mo

lookout Releases R versions

Daily download trend is not available in this view yet.

39830 days

1.6K90 days

5.7K1 year

Compare downloads with other packages →

Also on186 r2u47 autocran

Repository

GitHub ↗ sevvandi/lookout

29Stars

2Forks

1Open issues

0Open PRs

1Releases

108Commits

3Contributors

108 commits · Last activity 2026-07-21 · 0% stars, 30d

Repository practices

Upstream repositoryBeta

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

Checks run against github.com/sevvandi/lookout on 2026-07-19.

Continuous integration (1)

GitHub Actions

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

9 external dependencies (excludes base and recommended)

Depends (0)

none

Imports (7)

evd ggplot2 mlpack RANN robustbasestatstidyr

LinkingTo (0)

none

Suggests (3)

knitr rmarkdown testthat

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

1direct

0indirect

oddnet

Code & Tests

People & History

People (3)

Maintainer (1)

Sevvandi Kandanaarachchi

Author, Maintainer

Authors (2)

Sevvandi Kandanaarachchi

Author, Maintainer

Rob Hyndman

Author

Contributors (1)

Chris Fraley

Contributor · added in 0.1.3

Package Timeline

7 releases. R releases are shown for context.

2.0.2Latest
2026-07-21 · current release · diff ↗
R
R 4.6.0 released · 2026-04-24
2.0.1
2026-03-26 · diff ↗
2.0.0
2026-01-19 · diff ↗
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
0.1.4
2022-10-14 · diff ↗
0.1.3
2022-09-30 · diff ↗
0.1.2
2022-08-26 · diff ↗
R
R 4.2.0 released · 2022-04-22
R
R 4.1.0 released · 2021-05-18
0.1.0
2021-02-12
R
R 4.0.0 released · 2020-04-24

Package metadata

First published: 2021-02-12
Total releases: 7 / 5 yrs
License: GPL-3 OSI
Download size: 91 KB
Installed size: not tracked yet
With dependencies: not tracked yet

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