AnomalyDetection is an R package developed by Twitter for detecting anomalies in seasonal univariate time series. It implements the Seasonal Hybrid Extreme Studentized Deviate (S‑H‑ESD) test, which reliably identifies both global and local outliers in data with trends and seasonality—commonly applied to system metrics, engagement data, and business KPIs.

Features

  • Detects anomalies robustly even under seasonality and trend
  • Implements S‑H‑ESD: hybrid ESd with seasonal decomposition
  • R package easy to integrate into analytics workflows
  • Scalable for large series or batch processing
  • Produces clear diagnostic output and flags
  • Used extensively for system and product telemetry analysis

Project Samples

Project Activity

See All Activity >

Categories

System

License

GNU General Public License version 3.0 (GPLv3)

Follow AnomalyDetection

AnomalyDetection Web Site

Other Useful Business Software
Auth0 B2B Essentials: SSO, MFA, and RBAC Built In Icon
Auth0 B2B Essentials: SSO, MFA, and RBAC Built In

Unlimited organizations, 3 enterprise SSO connections, role-based access control, and pro MFA included. Dev and prod tenants out of the box.

Auth0's B2B Essentials plan gives you everything you need to ship secure multi-tenant apps. Unlimited orgs, enterprise SSO, RBAC, audit log streaming, and higher auth and API limits included. Add on M2M tokens, enterprise MFA, or additional SSO connections as you scale.
Sign Up Free
Rate This Project
Login To Rate This Project

User Reviews

Be the first to post a review of AnomalyDetection!

Additional Project Details

Operating Systems

Linux, Mac, Windows

Programming Language

R

Related Categories

R System Software

Registered

2025-07-29