/usr/include/octave-4.2.2/octave/sparse-qr.h is in liboctave-dev 4.2.2-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Copyright (C) 2016-2017 John W. Eaton
Copyright (C) 2005-2016 David Bateman
This file is part of Octave.
Octave is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
Octave is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with Octave; see the file COPYING. If not, see
<http://www.gnu.org/licenses/>.
*/
#if ! defined (octave_sparse_qr_h)
#define octave_sparse_qr_h 1
#include "octave-config.h"
#include "dMatrix.h"
#include "CMatrix.h"
#include "dSparse.h"
#include "CSparse.h"
namespace octave
{
namespace math
{
// If the sparse matrix classes become templated on the element type
// (i.e., sparse_matrix<double>), then it might be best to make the
// template parameter of this class also be the element type instead
// of the matrix type.
template <typename SPARSE_T>
class
sparse_qr
{
public:
sparse_qr (void);
sparse_qr (const SPARSE_T& a, int order = 0);
sparse_qr (const sparse_qr& a);
~sparse_qr (void);
sparse_qr& operator = (const sparse_qr& a);
bool ok (void) const;
SPARSE_T V (void) const;
ColumnVector Pinv (void) const;
ColumnVector P (void) const;
SPARSE_T R (bool econ = false) const;
typename SPARSE_T::dense_matrix_type
C (const typename SPARSE_T::dense_matrix_type& b) const;
typename SPARSE_T::dense_matrix_type
Q (void) const;
template <typename RHS_T, typename RET_T>
static RET_T
solve (const SPARSE_T& a, const RHS_T& b,
octave_idx_type& info);
private:
class sparse_qr_rep;
sparse_qr_rep *rep;
template <typename RHS_T, typename RET_T>
RET_T
tall_solve (const RHS_T& b, octave_idx_type& info) const;
template <typename RHS_T, typename RET_T>
RET_T
wide_solve (const RHS_T& b, octave_idx_type& info) const;
};
// Provide qrsolve for backward compatibility.
extern Matrix
qrsolve (const SparseMatrix& a, const MArray<double>& b,
octave_idx_type& info);
extern SparseMatrix
qrsolve (const SparseMatrix& a, const SparseMatrix& b,
octave_idx_type& info);
extern ComplexMatrix
qrsolve (const SparseMatrix& a, const MArray<Complex>& b,
octave_idx_type& info);
extern SparseComplexMatrix
qrsolve (const SparseMatrix& a, const SparseComplexMatrix& b,
octave_idx_type& info);
extern ComplexMatrix
qrsolve (const SparseComplexMatrix& a, const MArray<double>& b,
octave_idx_type& info);
extern SparseComplexMatrix
qrsolve (const SparseComplexMatrix& a, const SparseMatrix& b,
octave_idx_type& info);
extern ComplexMatrix
qrsolve (const SparseComplexMatrix& a, const MArray<Complex>& b,
octave_idx_type& info);
extern SparseComplexMatrix
qrsolve (const SparseComplexMatrix& a, const SparseComplexMatrix& b,
octave_idx_type& info);
typedef sparse_qr<SparseMatrix> SparseQR;
typedef sparse_qr<SparseComplexMatrix> SparseComplexQR;
}
}
#endif
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