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Asked: 2026-05-19T10:21:11+00:00

All, I have been playing with the R math standalone library in C++. I

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All,

I have been playing with the R math standalone library in C++. I quite like being able to generate random numbers and use distribution functions that I am comfortable with from R. My question is: is it possible to use the matrix operations (multiplication, transpose, inverse, Chol, etc) that are available in R in a standalone library? I don’t see them in Rmath.h.

If matrix operations are available to use in standalone C++ code, it seems that the R API becomes the perfect open source computational engine. Are people using it in this fashion?

Thanks so much for your guidance and suggestions!

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  1. Editorial Team

    Most, if not all, of the things you mention are provided by LAPACK or BLAS Fortran code that R links to, not something R provides new code for itself.

    If you are interested in using C++ with R, look at the Rcpp package by Dirk Eddelbuettel and Romain Francois. Dirk has also written the RcppArmadillo package as an interface to the Armadillo C++ linear algebra library that can do the matrix operations you mention.

    Whether this is of use will depend on whether you are wanting to write separate C++ code that is accessed outside R, or interfacing C++ code that you access within R. Rcpp facilitates (greatly) the latter. Take a look at Armadillo directly if it is the former situation.

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