Internal stub used by Day 15's profiling script to confirm the C++ compiler, Rcpp dispatch, and Armadillo linking all work before the real ports on Days 16-18. Performs a trivial 3x3 identity-matrix trace to exercise the linker.
Internal stub used by Day 15's profiling script to confirm the C++ compiler, Rcpp dispatch, and Armadillo linking all work before the real ports on Days 16-18. Performs a trivial 3x3 identity-matrix trace to exercise the linker.