R Observatory: Metrics for isotree version 0.6.1-5

Balamuta, James Joseph

doi:10.5281/zenodo.21843040

isotree

0.6.1-5Package record

Isolation-Based Outlier Detection

7packages dependsuggested by 2

29.8Kdownloads / year

–test coverage

13/13flavors OK

Overview

About

Maintained by David CortesCRAN page ↗GitHub ↗Issues ↗

Fast and multi-threaded implementation of isolation forest (Liu, Ting, Zhou (2008) doi:10.1109/ICDM.2008.17), extended isolation forest (Hariri, Kind, Brunner (2018) doi:10.48550/arXiv.1811.02141), SCiForest (Liu, Ting, Zhou (2010) doi:10.1007/978-3-642-15883-4_18), fair-cut forest (Cortes (2021) doi:10.48550/arXiv.2110.13402), robust random-cut forest (Guha, Mishra, Roy, Schrijvers (2016) http://proceedings.mlr.press/v48/guha16.html), and customizable variations of them, for isolation-based outlier detection, clustered outlier detection, distance or similarity approximation (Cortes (2019) doi:10.48550/arXiv.1910.12362), isolation kernel calculation (Ting, Zhu, Zhou (2018) doi:10.1145/3219819.3219990), and imputation of missing values (Cortes (2019) doi:10.48550/arXiv.1911.06646), based on random or guided decision tree splitting, and providing different metrics for scoring anomalies based on isolation depth or density (Cortes (2021) doi:10.48550/arXiv.2111.11639). Provides simple heuristics for fitting the model to categorical columns and handling missing data, and offers options for varying between random and guided splits, and for using different splitting criteria.

Install

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

install.packages("isotree", 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("david-cortes/isotree")

Development version from david-cortes/isotree. 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-isotree

Fast Ubuntu binaries via r2u (no compilation). The cranapt setup runs once and is skipped when it is already enabled. We list this channel from recorded r2u download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

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-isotree

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-isotree

RPMs auto-built from CRAN on openSUSE OBS (Tumbleweed). We list this channel from recorded autoCRAN download activity rather than from a live index of the repository, so treat it as last known rather than guaranteed.

Health

CRAN checks

13OK

CRAN check page ↗

Slowest check: 4.8 min · r-devel-windows-x86_64

Status changes

OK13 OK2026-08-05
NOTE12 OK, 1 NOTE2026-08-01
OK12 OK2026-04-25
NOTE12 OK, 2 NOTE2026-04-22
ERROR11 OK, 2 NOTE, 1 ERROR2026-04-18

Show 1 earlier changeHide 1 earlier change

NOTE12 OK, 2 NOTE2026-03-10

Advisories

none known

How this is measured·How advisories are found

Documentation

In release 0.6.1-5

README· In the repository, left out of the releaseVignettesYes · 1 · dynamicNEWSNoCitation fileNoWebsitenot declared in DESCRIPTION

Help pages: 25
Examples that run: 83%5 run in a plain check · 1 never run
Exported functions with examples: 26%
Documented parameters: 91%
Return-value docs: 100%
Help pages citing references: 4%

Vignettes (1)

An Introduction to Isolation Forests

How these are measured

Downloads

29.8K

CRAN downloads in the past year

Rank #2,218 · ~82/day · ~2.5K/mo

Releases R versions

Daily download trend is not available in this view yet.

3.1K30 days

7.9K90 days

29.8K1 year

Compare downloads with other packages →

Also on473 r2u5 autocran4K conda_forge96 c2d4u

How downloads are counted

Repository

david-cortes/isotree ↗Account: david-cortes

231Stars

40Forks

1Open issues

0Open PRs

0Releases

582Commits

8Commit identities

isolation-forestoutlier-detectionanomaly-detectionimputation

License file reads as BSD-2-Clause · 582 commits · Last activity 2026-06-21 · 0% stars, 30d

Responsiveness

How these are sampled

PRs merged (all time): 93%
Median days to close, 50 most recently updated closed issues: 0
Median days to close, 50 most recently updated closed PRs: 0

Stars over time

2025-09-03 · 2182026-07-25 · 231

How these are measured

PracticesBeta

2 development-tooling and community-health practices detected across 1 family in the upstream repository

Checks run against github.com/david-cortes/isotree on 2026-10-21.

Git structural (2)

.gitattributesSubmodules

How this is detected·Detection ruleset v4 (2026-10-20)

Dependencies

Declared dependencies

12 external dependencies (excludes base and recommended)

Installing isotree adds 3 packages (3 with compiled code, 2.8 MB of source tarballs). Heaviest: Rcpp 1.8 MB, jsonlite 1.0 MB, RhpcBLASctl 41 KB.

Depends (1)

R >= 4.3.0

Imports (4)

Rcpp jsonlite RhpcBLASctlmethods

LinkingTo (1)

Rcpp

Suggests (9)

MASSoutliertree DiagrammeR mlbench MLmetrics kernlab knitr rmarkdown kableExtra

Enhances (0)

none

Dependency license breakdown →

Reverse dependencies

7direct

0indirect

Depends 1 · Imports 6

Suggested by 2

Depends, Imports or LinkingTo, most downloaded first

bulkQC rrobot autoFlagR rarefun ifCNVR quickOutlier reverseR

Suggests, most downloaded first

applicable familiar

How these are counted

Code & Tests

People & History

People (8)

David Cortes

David Blackman

Copyright holder · added in 0.3.0

Copyright holder of original xoshiro code

NumPy Developers

Copyright holder · added in 0.5.14

Copyright holder of formatted ziggurat tables

SciPy Developers

Copyright holder · added in 0.5.19-1

Copyright holder of parts of digamma implementation

Thibaut Goetghebuer-Planchon

Copyright holder · added in 0.3.0

Copyright holder of included robinmap library

Enthought Inc

Copyright holder · added in 0.5.19-1

Copyright holder of parts of digamma implementation

Stephen Moshier

Copyright holder · added in 0.5.19-1

Copyright holder of parts of digamma implementation

Sebastiano Vigna

Copyright holder · added in 0.3.0

Copyright holder of original xoshiro code

Releases (29)

Pick two releases to compare their code metrics.

R
R 4.6.0 released · 2026-04-24
0.6.1-5Latest
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2026-03-05 · current release · diff ↗
R
R 4.5.0 released · 2025-04-11
0.6.1-4
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2025-01-08 · diff ↗
R
R 4.4.0 released · 2024-04-24
0.6.1-1
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2024-03-27 · diff ↗ ·
added 4 exports
isotree.is.same, isotree.plot.tree, isotree.to.graphviz, isotree.to.json
0.5.24-3
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2023-12-02 · diff ↗
0.5.24-2
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2023-12-01 · diff ↗
0.5.24-1
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2023-11-28 · diff ↗
0.5.24
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2023-11-19 · diff ↗
0.5.22
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2023-08-07 · diff ↗
0.5.20
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2023-05-23 · diff ↗
R
R 4.3.0 released · 2023-04-21
0.5.19-1
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2023-03-16 · diff ↗
0.5.17
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2022-09-07 · diff ↗
0.5.16
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2022-08-06 · diff ↗

Show 21 earlier eventsHide 21 earlier events

R
R 4.2.0 released · 2022-04-22
0.5.15
record
2022-03-31 · diff ↗
0.5.14
record
2022-02-13 · diff ↗ ·
added 6 exports
isotree.build.indexer, isotree.drop.imputer, isotree.drop.indexer, isotree.drop.reference.points, isotree.set.nthreads, isotree.set.reference.points
0.5.5
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2022-01-11 · diff ↗
0.3.9
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2021-10-23 · diff ↗
0.3.0
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2021-08-22 · diff ↗ ·
removed 7 exports
unpack.isolation.forest, add.isolation.tree, get.num.nodes, append.trees, export.isotree.model, load.isotree.model, deepcopy.isotree

added 8 exports
isotree.restore.handle, isotree.add.tree, isotree.get.num.nodes, isotree.append.trees, isotree.export.model, isotree.import.model, isotree.subset.trees, isotree.deep.copy
0.2.10
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2021-07-17 · diff ↗
0.2.8
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2021-07-11 · diff ↗
R
R 4.1.0 released · 2021-05-18
0.2.7
record
2021-03-01 · diff ↗
0.1.28
record
2021-01-13 · diff ↗ ·
added 4 exports
predict.isolation_forest, print.isolation_forest, summary.isolation_forest, deepcopy.isotree
0.1.24
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2020-12-10 · diff ↗ ·
added 1 export
isotree.to.sql
0.1.20
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2020-10-14 · diff ↗
0.1.19
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2020-10-11 · diff ↗
0.1.18
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2020-07-29 · diff ↗
0.1.17
record
2020-07-20 · diff ↗ ·
added 3 exports
append.trees, export.isotree.model, load.isotree.model
0.1.11
record
2020-04-27 · diff ↗ ·
added 1 export
get.num.nodes
R
R 4.0.0 released · 2020-04-24
0.1.8
record
2020-01-08 · diff ↗ ·
removed 1 export
add_isolation_tree

added 1 export
add.isolation.tree
0.1.5
record
2019-12-18
R
R 3.6.0 released · 2019-04-26

Package metadata

First published: 2019-12-18
Total releases: 29 / 7 yrs
License: BSD_2_clause + file LICENSE OSI
Minimum R: ≥ 4.3.0
Download size: 1.1 MB

Appears in task views

Anomaly Detection Missing Data

Cite

Cite this package

Run in R for the authors' preferred citation:

citation("isotree")

Format

Cortes, D., Blackman, D., Developers, N., Developers, S., Goetghebuer-Planchon, T., Inc, E., Moshier, S., & Vigna, S. (2026). isotree: Isolation-Based Outlier Detection (Version 0.6.1-5) [Computer software]. https://doi.org/10.32614/CRAN.package.isotree

This package has no citation file, so citation() returns this entry built from DESCRIPTION.

Cite the R Observatory

For a number measured here: a download total, a coverage figure, an archival date.

Format

APA

Balamuta, J. J. (2026). R Observatory: Metrics for isotree version 0.6.1-5 [Data set]. HJJB, LLC. Data release v2026-10-25. https://doi.org/10.5281/zenodo.21843040

From data release v2026-10-25, which the citation names so these numbers can be found later. More on citing and the projects behind them.

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