ziyufan / Isolation_forest

Isolation_forest

Goal:

This project is an implementation of Isolation Forest algorithm by Fei Tony Liu, Kai Ming Ting, and Zhi-Hua Zhou.

Algorithm:

Anomalies are few and different. Isolation forest algorithm focus on those anomaly points. See the scripts for the details. Scripts

For your convenience, here are the algorithms extracted from the Liu et al paper:

Example:

Fit the Isolation tree algorithm to cancer dataset. Here is the anomaly score threshold for the model. Checkout the notebook for more details about the example. Example

Reference:

Isolation-based Anomaly detection, Fei Tony Liu, Kai Ming Ting and Zhi-Hua Zhou Original paper