mlpack is a community-led effort, and so the code is not possible without the community. Since mlpack is an open-source project, anyone is welcome to become a part of the community and contribute. There is no need to be a machine learning expert to participate—often, there are many tasks to be done that don’t require in-depth knowledge.

Over the past several years, mlpack has participated in Google Summer of Code. For more information, see this page.

All mlpack development is done on GitHub. In addition to that, there are a few channels of communication:

mlpack mailing lists

Two mailing lists are used for mlpack discussion and development:

getting involved

Everyone is welcome to contribute to mlpack. But before becoming a contributor, it’s often useful to understand mlpack as a user. So, a good place to start is to download mlpack and use the Python bindings, Julia bindings, or the command-line programs to perform machine learning tasks. You can also write C++ programs to perform machine learning tasks with mlpack; here are some basic examples.

Once you have an idea of what’s included in mlpack and how a user might use it, then a good next step would be to set up a development environment. Once you have that set up, you can build mlpack from source and explore the codebase to see how it’s organized. It may even be useful to try and make small changes to the code, then rebuild the command-line programs and see what your changes did.

Now you’re set up to contribute! There are lots of ways you can contribute. Here are a couple ideas:

  • Help others figure out their mlpack issues and questions. Here is a list of Github issues tagged question. Helping others figure out their problems is really one of the best ways to learn about the library.

  • Find an issue that needs implementation help; here is a list of Github issues tagged help wanted; and here is a list of Github issues tagged good first issue. Once you open a PR that passes all the continuous integration tests, the community will review it and get it merged into the codebase.

  • Find an abandoned pull request; here is a list of pull requests that were closed for inactivity. Often these have comments that need to be addressed, but the original author didn’t have time to finish the work. So, you can pick up where they left off!

  • Implement a new machine learning algorithm that mlpack doesn’t currently have.

  • Take a look at the ideas on the Google Summer of Code Ideas List and see if you find any of them interesting or exciting. Even if you’re not planning to do Summer of Code, it’s okay to take these ideas and implement them separately.

  • Do some timing on an existing machine learning algorithm implemented by mlpack, and try to make it faster.

  • If you find a bug or have a problem, open an issue for it—issue templates are provided to make reporting easier.

real-time chat

The mlpack community stays in touch in real-time via several chat services that are all linked together thanks to the Matrix project. You can choose any of the services below and will be able to communicate with anyone who is using any of the other services (assuming that the inter-service bridges are correctly operating).

IRC via freenode: #mlpack; you can use webchat (the link), or set up an account on freenode and use a client of your choice.

Gitter: mlpack/mlpack; you will need a Github account

Matrix:; you will need to set up a account and use a client such as Riot or others.

Slack:; in order to create an account, you’ll need to use the auto-inviter to send yourself an invite:

Discussions in the chat channel are logged.

video meet-up

On the first and third Thursday of every month, at 1800 UTC on Thursdays, we have casual video meetups with no particular agenda. Feel free to join up! We often talk about code changes that we are working on, issues people are having with mlpack, general design direction, and whatever else might be on our mind. We use this Zoom room. For security, we use a password for the meeting to keep malicious bots out; the password is simple—it’s just the name of the library (in all lowercase).


Below is a list of contributors to mlpack. Without their hard work, this software would not be possible.

  • Ryan Curtin
  • Bill March
  • Dongryeol Lee
  • Nishant Mehta
  • Parikshit Ram
  • James Cline
  • Sterling Peet
  • Matthew Amidon
  • Neil Slagle
  • Ajinkya Kale
  • Vlad Grantcharov
  • Noah Kauffman
  • Rajendran Mohan
  • Trironk Kiatkungwanglai
  • Patrick Mason
  • Marcus Edel
  • Mudit Raj Gupta
  • Sumedh Ghaisas
  • Michael Fox
  • Ryan Birmingham
  • Siddharth Agrawal
  • Saheb Motiani
  • Yash Vadalia
  • Abhishek Laddha
  • Vahab Akbarzadeh
  • Andrew Wells
  • Zhihao Lou
  • Udit Saxena
  • Stephen Tu
  • Jaskaran Singh
  • Shangtong Zhang
  • Hritik Jain
  • Vladimir Glazachev
  • QiaoAn Chen
  • Janzen Brewer
  • Trung Dinh
  • Tham Ngap Wei
  • Grzegorz Krajewski
  • Joseph Mariadassou
  • Pavel Zhigulin
  • Andy Fang
  • Barak Pearlmutter
  • Ivari Horm
  • Dhawal Arora
  • Alexander Leinoff
  • Palash Ahuja
  • Yannis Mentekidis
  • Ranjan Mondal
  • Mikhail Lozhnikov
  • Marcos Pividori
  • Keon Kim
  • Nilay Jain
  • Peter Lehner
  • Anuraj Kanodia
  • Ivan Georgiev
  • Shikhar Bhardwaj
  • Yashu Seth
  • Mike Izbicki
  • Sudhanshu Ranjan
  • Piyush Jaiswal
  • Dinesh Raj
  • Vivek Pal
  • Prasanna Patil
  • Lakshya Agrawal
  • Praveen Ch
  • Kirill Mishchenko
  • Abhinav Moudgil
  • Thyrix Yang
  • Sagar B Hathwar
  • Nishanth Hegde
  • Parminder Singh
  • CodeAi
  • Franciszek Stokowacki
  • Samikshya Chand
  • N Rajiv Vaidyanathan
  • Kartik Nighania
  • Eugene Freyman
  • Manish Kumar
  • Haritha Sreedharan Nair
  • Sourabh Varshney
  • Projyal Dev
  • Nikhil Goel
  • Shikhar Jaiswal
  • B Kartheek Reddy
  • Atharva Khandait
  • Wenhao Huang
  • Roberto Hueso
  • Prabhat Sharma
  • Tan Jun An
  • Moksh Jain
  • Manthan-R-Sheth
  • Namrata Mukhija
  • Conrad Sanderson
  • Thanasis Mattas
  • Shashank Shekhar
  • Yasmine Dumouchel
  • German Lancioni
  • Arash Abghari
  • Ayush Chamoli
  • Tommi Laivamaa
  • Kim SangYeon
  • Niteya Shah
  • Toshal Agrawal
  • Dan Timson
  • Miguel Canteras
  • Bishwa Karki
  • Mehul Kumar Nirala
  • Yashwant Singh Parihar
  • Heet Sankesara
  • Jeffin Sam
  • Vikas S Shetty
  • Khizir Siddiqui
  • Tejasvi Tomar
  • Jai Agarwal