toMatrix() [2/2]

template<typename CoeffRing>

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

Definition at line 192 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();
  ring_elem f;
  auto i = A.begin();
  for (int c = 0; c < ncols; c++)
    {
      ring_elem a;
      for (i.set(c); i.valid(); i.next())
        {
          i.copy_elem(a);
          int r = static_cast<int>(i.row());
          result.set_entry(r, c, a);
        }
    }
  result.compute_column_degrees();
  return result.to_matrix();
}

References SMat< ACoeffRing >::begin(), Ring::make_FreeModule(), Matrix, SMat< ACoeffRing >::numColumns(), SMat< ACoeffRing >::numRows(), and result().