subtract()

template<typename Mat>

virtual MutableMat * MutableMat< Mat >::subtract ( const MutableMatrix * B ) const

inlinevirtual

Implements MutableMatrix.

Definition at line 687 of file mutablemat-defs.hpp.

  {
    const Mat* B1 = B->coerce_const<Mat>();
    if (B1 == NULL)
      {
        ERROR("expected matrices with the same ring and sparsity");
        return NULL;
      }
    if (B->get_ring() != get_ring())
      {
        ERROR("expected matrices with the same ring");
        return NULL;
      }
    if (B1->numRows() != n_rows() || B1->numColumns() != n_cols())
      {
        ERROR("expected matrices of the same shape");
        return NULL;
      }
 
    MutableMat* result = clone();
    MatrixOps::subtractInPlace(result->getMat(), *B1);
    return result;
  }

References clone(), ERROR, get_ring(), MutableMat(), MutableMatrix::MutableMatrix(), n_cols(), n_rows(), result(), and MatrixOps::subtractInPlace().