arrange                 Order matrix elements based on rownames and/or
                        colnames
expand                  Expand a matrix to larger dimensions, filling
                        in new entries
futile.matrix-package   A collection of matrix manipulation functions
peek                    Peeks inside a matrix or vector
read.matrix             Read a sparse matrix from a file and return a
                        matrix
select                  Select a subset of a matrix and make
                        assignments as necessary
