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isotree (version 0.5.15)

Isolation-Based Outlier Detection

Description

Fast and multi-threaded implementation of isolation forest (Liu, Ting, Zhou (2008) ), extended isolation forest (Hariri, Kind, Brunner (2018) ), SCiForest (Liu, Ting, Zhou (2010) ), fair-cut forest (Cortes (2021) ), robust random-cut forest (Guha, Mishra, Roy, Schrijvers (2016) ), and customizable variations of them, for isolation-based outlier detection, clustered outlier detection, distance or similarity approximation (Cortes (2019) ), isolation kernel calculation (Ting, Zhu, Zhou (2018) ), and imputation of missing values (Cortes (2019) ), based on random or guided decision tree splitting, and providing different metrics for scoring anomalies based on isolation depth or density (Cortes (2021) ). 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.

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Install

install.packages('isotree')

Monthly Downloads

1,252

Version

0.5.15

License

BSD_2_clause + file LICENSE

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Last Published

March 31st, 2022

Functions in isotree (0.5.15)

isotree.deep.copy

Deep-Copy an Isolation Forest Model Object
isotree.export.model

Export Isolation Forest model
isotree.append.trees

Append isolation trees from one model into another
isotree.drop.reference.points

Drop Reference Points from Isolation Forest Model Object
isotree.get.num.nodes

Get Number of Nodes per Tree
isotree.drop.indexer

Drop Indexer Sub-Object from Isolation Forest Model Object
isotree.build.indexer

Build Indexer for Faster Terminal Node Predictions and/or Distance Calculations
isotree.drop.imputer

Drop Imputer Sub-Object from Isolation Forest Model Object
isolation.forest

Create Isolation Forest Model
isotree.add.tree

Add additional (single) tree to isolation forest model
isotree.set.nthreads

Set Number of Threads for Isolation Forest Model Object
isotree.set.reference.points

Set Reference Points to Calculate Distances or Kernels With
isotree.restore.handle

Unpack isolation forest model after de-serializing
isotree.import.model

Load an Isolation Forest model exported from Python
summary.isolation_forest

Print summary information from Isolation Forest model
isotree.to.sql

Generate SQL statements from Isolation Forest model
isotree.subset.trees

Subset trees of a given model
print.isolation_forest

Print summary information from Isolation Forest model
predict.isolation_forest

Predict method for Isolation Forest