The RcppEnsmallen package brings to R a Header-Only C++ Mathematical Optimization Library for Armadillo. In particular, Ensmallen is a templated C++ mathematical optimization library (by the MLPACK team) that provides a simple set of abstractions for writing an objective function to optimize. After the massive update that was 2.10.0, the Ensmallen Development Team has provided a patch for better backward compatibility with the 1.y.z series. In addition, there are a few bug fixes that attempt to address edge …