dtaianomaly

Time series anomaly detection

A simple-to-use Python package for the development and analysis of time series anomaly detection techniques. Here we describe the main usage of dtaianomaly, but be sure to check out the documentation for more information.

Installation

The preferred way to install dtaianomaly is via PyPi. See the documentation for more options.

pip install dtaianomaly

Features

The three key features of dtaianomaly are as follows:

1. State-of-the-art time series anomaly detection via a simple API. Learn more!
2. Develop custom models for anomaly detection. Learn more!
3. Quantitative evaluation of time series anomaly detection. Learn more!

Example

Below code shows a simple example of dtaianomaly, which is part of the anomaly detection notebook. More examples are provided in the other notebooks and in the documentation.

from dtaianomaly.data import demonstration_time_series
from dtaianomaly.preprocessing import MovingAverage
from dtaianomaly.anomaly_detection import MatrixProfileDetector

# Load the data
X, y = demonstration_time_series()

# Preprocess the data using a moving average
preprocessor = MovingAverage(window_size=10)
X_, _ = preprocessor.fit_transform(X)

# Fit the matrix profile detector on the processed data
detector = MatrixProfileDetector(window_size=100)
detector.fit(X_)

# Compute either the decision scores, specific to the detector, or the anomaly probabilities
decision_scores = detector.decision_function(X_)
anomaly_probabilities = detector.predict_proba(X_)

Acknowledgments

If you find dtaianomaly useful for your work, we would appreciate the following citation:

@article{carpentier2025dtaianomaly,
      title={{dtaianomaly: A Python library for time series anomaly detection}}, 
      author={Louis Carpentier and Nick Seeuws and Wannes Meert and Mathias Verbeke},
      year={2025},
      eprint={2502.14381},
      archivePrefix={arXiv},
      primaryClass={cs.LG},
      url={https://arxiv.org/abs/2502.14381}, 
}

Carpentier, L., Seeuws, N., Meert, W., Verbeke, M.: dtaianomaly: A Python library for time series anomaly detection (2025), https://arxiv.org/abs/2502.14381

Contribute

The goal of dtaianomaly is to be community-driven. All types of contributions are welcome. This includes code, but also bug reports, improvements to the documentation, additional tests and more. Check out the documentation to find more information about how you can contribute!

License

Copyright (c) 2023-2025 KU Leuven, DTAI Research Group

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.