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LightGBM, Light Gradient Boosting Machine
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=========================================
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[![Build Status](https://travis-ci.org/Microsoft/LightGBM.svg?branch=master)](https://travis-ci.org/Microsoft/LightGBM)
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[![Windows Build status](https://ci.appveyor.com/api/projects/status/1ys5ot401m0fep6l/branch/master?svg=true)](https://ci.appveyor.com/project/guolinke/lightgbm/branch/master)
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[![Documentation Status](https://readthedocs.org/projects/lightgbm/badge/?version=latest)](http://lightgbm.readthedocs.io/)
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[![PyPI version](https://badge.fury.io/py/lightgbm.svg)](https://badge.fury.io/py/lightgbm)
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LightGBM is a gradient boosting framework that uses tree based learning algorithms. It is designed to be distributed and efficient with the following advantages:
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- Faster training speed and higher efficiency
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- Lower memory usage
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- Better accuracy
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- Parallel and GPU learning supported
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- Capable of handling large-scale data
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For more details, please refer to [Features](https://github.com/Microsoft/LightGBM/wiki/Features).
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[Experiments](https://github.com/Microsoft/LightGBM/wiki/Experiments#comparison-experiment) on public datasets show that LightGBM can outperform existing boosting frameworks on both efficiency and accuracy, with significantly lower memory consumption. What's more, the [experiments](https://github.com/Microsoft/LightGBM/wiki/Experiments#parallel-experiment) show that LightGBM can achieve a linear speed-up by using multiple machines for training in specific settings.
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News
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----
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06/20/2017: Python-package is on PyPI now.
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06/09/2017: [LightGBM Slack team](https://lightgbm.slack.com) is available.
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05/03/2017: LightGBM v2 stable release.
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04/10/2017 : LightGBM now supports GPU-accelerated tree learning. Please read our [GPU Tutorial](./docs/GPU-Tutorial.md) and [Performance Comparison](./docs/GPU-Performance.md).
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02/20/2017 : Update to LightGBM v2.
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02/12/2017: LightGBM v1 stable release.
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01/08/2017 : Release [**R-package**](./R-package) beta version, welcome to have a try and provide feedback.
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12/05/2016 : **Categorical Features as input directly**(without one-hot coding). Experiment on [Expo data](http://stat-computing.org/dataexpo/2009/) shows about 8x speed-up with same accuracy compared with one-hot coding.
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12/02/2016 : Release [**python-package**](./python-package) beta version, welcome to have a try and provide feedback.
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External (unofficial) Repositories
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----------------------------------
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Julia Package: https://github.com/Allardvm/LightGBM.jl
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JPMML: https://github.com/jpmml/jpmml-lightgbm
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Get Started And Documents
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-------------------------
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To get started, please follow the [Installation Guide](https://github.com/Microsoft/LightGBM/wiki/Installation-Guide) and [Quick Start](https://github.com/Microsoft/LightGBM/wiki/Quick-Start).
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* [**Wiki**](https://github.com/Microsoft/LightGBM/wiki)
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* [**Installation Guide**](https://github.com/Microsoft/LightGBM/wiki/Installation-Guide)
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* [**Quick Start**](https://github.com/Microsoft/LightGBM/wiki/Quick-Start)
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* [**Examples**](https://github.com/Microsoft/LightGBM/tree/master/examples)
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* [**Features**](https://github.com/Microsoft/LightGBM/wiki/Features)
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* [**Parallel Learning Guide**](https://github.com/Microsoft/LightGBM/wiki/Parallel-Learning-Guide)
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* [**GPU Learning Tutorial**](https://github.com/Microsoft/LightGBM/blob/master/docs/GPU-Tutorial.md)
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* [**Configuration**](https://github.com/Microsoft/LightGBM/wiki/Configuration)
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* [**Document Indexer**](https://github.com/Microsoft/LightGBM/blob/master/docs/README.md)
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External Links
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--------------
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Useful if you are looking for details:
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* [**Read The Docs**](http://lightgbm.readthedocs.io/en/latest/) for an all in one documentation from this repository in a browsable fashion
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* [**Laurae++ interactive documentation**](https://sites.google.com/view/lauraepp/parameters) for an interactive and detailed documentation on hyperparameters
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Support
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-------
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You can ask questions and join the development discussion on:
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* [LightGBM Slack team](https://lightgbm.slack.com).
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* Use [this invite link](https://join.slack.com/lightgbm/shared_invite/MTk1MjM1Mjg2NDA1LTE0OTY5NzMwNDgtYTRiZGQ5YzM3OQ) to join the team.
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You can also create **bug reports and feature requests** (not including questions) in [Github issues](https://github.com/Microsoft/LightGBM/issues).
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How to Contribute
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-----------------
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LightGBM has been developed and used by many active community members. Your help is very valuable to make it better for everyone.
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- Check out [call for contributions](https://github.com/Microsoft/LightGBM/issues?q=is%3Aissue+is%3Aopen+label%3Acall-for-contribution) to see what can be improved, or open an issue if you want something.
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- Contribute to the [tests](https://github.com/Microsoft/LightGBM/tree/master/tests) to make it more reliable.
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- Contribute to the [documents](https://github.com/Microsoft/LightGBM/tree/master/docs) to make it clearer for everyone.
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- Contribute to the [examples](https://github.com/Microsoft/LightGBM/tree/master/examples) to share your experience with other users.
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- Check out [Development Guide](./docs/development.md).
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- Open issue if you met problems during development.
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Microsoft Open Source Code of Conduct
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------------
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This project has adopted the [Microsoft Open Source Code of Conduct](https://opensource.microsoft.com/codeofconduct/). For more information see the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or contact [opencode@microsoft.com](mailto:opencode@microsoft.com) with any additional questions or comments.
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All documentation is located at https://lightgbm.readthedocs.io/en/latest/index.html.
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