Method operator()

inst/include/Rcpp/vector/Matrix.h:137–139

    }

    inline Proxy operator()( const size_t& i, const size_t& j) {
      return static_cast< Vector<RTYPE>* >( this )->operator[]( offset( i, j ) ) ;
    }
    inline const_Proxy operator()( const size_t& i, const size_t& j) const {
       return static_cast< const Vector<RTYPE>* >( this )->operator[]( offset( i, j ) ) ;
    }