In writing R packages, I need some rudimentary support for matrix/array in C code and I would also like to use Blas/Lapack functions. Previously I just rolled out my own (simple) C++ classes. But it becomes troublesome for multiple packages (having duplicated files and needing to keep them in sync, etc.) I found that the src/library/stats/src/mAR.c defined struct Array and some utility functions, which would be useful. Since I think some simple matrix support is widely needed, I wonder if the core team would consider include this (or similar things, such as the C++ classes in package Matrix, with more intuitive interface to Blas/Lapack for 'casual' users) in R public API? Thanks, Michael