Method update_index

inst/include/Rcpp/vector/MatrixBase.h:180–183

            int nr, nc ;

            inline void update_index( int index_ ){
                i = internal::get_line( index_, nr );
                j = internal::get_column( index_, nr, i ) ;
            }

            inline R_xlen_t index() const {
                return i + nr * j ;