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.
| Version: | 0.6.1-5 |
| Depends: | R (≥ 4.3.0) |
| Imports: | Rcpp (≥ 1.0.1), jsonlite (≥ 1.7.3), RhpcBLASctl, methods |
| LinkingTo: | Rcpp |
| Suggests: | MASS, outliertree, DiagrammeR, mlbench, MLmetrics, kernlab, knitr, rmarkdown, kableExtra |
| Enhances: | Matrix, SparseM |
| Published: | 2026-03-05 |
| DOI: | 10.32614/CRAN.package.isotree |
| Author: | David Cortes [aut, cre, cph], Thibaut Goetghebuer-Planchon [cph] (Copyright holder of included robinmap library), David Blackman [cph] (Copyright holder of original xoshiro code), Sebastiano Vigna [cph] (Copyright holder of original xoshiro code), NumPy Developers [cph] (Copyright holder of formatted ziggurat tables), SciPy Developers [cph] (Copyright holder of parts of digamma implementation), Enthought Inc [cph] (Copyright holder of parts of digamma implementation), Stephen Moshier [cph] (Copyright holder of parts of digamma implementation) |
| Maintainer: | David Cortes <david.cortes.rivera at gmail.com> |
| BugReports: | https://github.com/david-cortes/isotree/issues |
| License: | BSD_2_clause + file LICENSE |
| Copyright: | see file COPYRIGHTS |
| URL: | https://github.com/david-cortes/isotree |
| NeedsCompilation: | yes |
| In views: | AnomalyDetection, MissingData |
| CRAN checks: | isotree results |
| Reference manual: | isotree.html , isotree.pdf |
| Vignettes: |
An Introduction to Isolation Forests (source, R code) |
| Package source: | isotree_0.6.1-5.tar.gz |
| Windows binaries: | r-devel: isotree_0.6.1-5.zip, r-release: isotree_0.6.1-5.zip, r-oldrel: isotree_0.6.1-5.zip |
| macOS binaries: | r-release (arm64): isotree_0.6.1-5.tgz, r-oldrel (arm64): isotree_0.6.1-5.tgz, r-release (x86_64): isotree_0.6.1-5.tgz, r-oldrel (x86_64): isotree_0.6.1-5.tgz |
| Old sources: | isotree archive |
| Reverse depends: | bulkQC |
| Reverse imports: | autoFlagR, epimutacions, ifCNVR, itsdm, quickOutlier, reverseR, rrobot, scDiagnostics |
| Reverse suggests: | applicable, familiar |
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