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Interfacing a shared core codebase in C++ with Python and R

Python

Numpy arrays can be mapped using pybind11 to Eigen interface. Then, core function myfunc can be executed on the mapped matrix.

To execute the test function and profile memory usage, run

/usr/bin/time -v python test.py

R

RcppEigen can map an R matrix object to Eigen without copying. Then, core function myfunc can be executed on the mapped matrix

To execute the test function and profile memory usage, run

/usr/bin/time -v Rscript test.R

myfunc template code

myfunc is written in template code so that the instantiated type can change depending on how it is compiled. Due to differences in Python vs. R storage order and interface package, the input type cannot be constrained further.