Welcome to Matrix - Methods and Classes project!
R package with S4 classes and methods for matrices, linking to state-of-the-art algorithms for dense and sparse matrices, notably Lapack, CHOLMOD and Csparse.
Matrix has been a "recommended" R package since R version 2.9.0 (October 2008). This means that it is now part of every regular installation of R.
The Matrix package comes with several vignettes describing its functionality.
In addition, we provide slides of presentations or talks about the subject.
Doxygen documentation of the underlying C functions is here.
Do read on compatibility changes in connection with Matrix.
The project summary page is here.