toMatrix() [1/2]

template<typename CoeffRing>

Matrix * toMatrix	(	const Ring *	R,
		const DMat< CoeffRing > &	A )

Definition at line 168 of file mutablemat-defs.hpp.

{
  int nrows = static_cast<int>(A.numRows());
  int ncols = static_cast<int>(A.numColumns());
  FreeModule* F = R->make_FreeModule(nrows);
  MatrixConstructor result(F, ncols);
  if (nrows == 0 || ncols == 0) return result.to_matrix();
 
  for (int r = 0; r < nrows; ++r)
    for (int c = 0; c < ncols; ++c)
      {
        const typename CoeffRing::ElementType & a = A.entry(r,c);
        if (not A.ring().is_zero(a))
            {
              ring_elem ra;
              A.ring().to_ring_elem(ra, a);
              result.set_entry(r, c, ra);
            }
      }        
 
  result.compute_column_degrees();
  return result.to_matrix();
}

References DMat< ACoeffRing >::entry(), Ring::make_FreeModule(), Matrix, DMat< ACoeffRing >::numColumns(), DMat< ACoeffRing >::numRows(), result(), and DMat< ACoeffRing >::ring().

Referenced by MutableMat< Mat >::to_matrix().