mlpack 4: a fast, header-only C++ machine learninglibrary

Abstract

For over 15 years, the mlpack machine learning library has served as a “swiss army knife’’ for C++-based machine learning (Curtin et al., 2013). Its efficient implementations of common and cutting-edge machine learning algorithms have been used in a wide variety of scientific and industrial applications. This paper overviews mlpack 4, a significant upgrade over its predecessor (Curtin et al., 2018). The library has been significantly refactored and redesigned to facilitate an easier prototyping-to-deployment pipeline, including bindings to other languages (Python, Julia, R, Go, and the command line) that allow prototyping to be seamlessly performed in environments other than C++.