yzhao062/pyod

Support for DBSCAN based methods

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#303 opened on May 12, 2021

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help wanted

Description

Is it possible to add DBSCAN based methods (https://en.wikipedia.org/wiki/DBSCAN#Extensions) for anomaly detection?

The normal DBSCAN/OPTICS in sklearn don't support a predict method as such but the hdbscan library supports one.

Contributor guide

Tech stack
pythonscikit learn
Domain
machine learningdata
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Basic knowledge of DBSCANPythonscikit learn
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
To implement DBSCAN based methods, study the hdbscan library's predict functionality compared to sklearn's DBSCAN. Integrate the algorithm into pyod by adding a new detector class following existing conventions, inheriting from BaseDetector, and implementing fit and predict methods. Review pyod/models for structure and test with standard outlier detection datasets.