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floatSVD.h

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/*

Copyright (C) 1994, 1995, 1996, 1997, 2000, 2002, 2003, 2004, 2005,
              2006, 2007, 2008 John W. Eaton

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_FloatSVD_h)
#define octave_FloatSVD_h 1

#include <iosfwd>

#include "fDiagMatrix.h"
#include "fMatrix.h"
#include "dbleSVD.h"

class
OCTAVE_API
FloatSVD
{
public:

  FloatSVD (void) : sigma (), left_sm (), right_sm () { }

  FloatSVD (const FloatMatrix& a, SVD::type svd_type = SVD::std) { init (a, svd_type); }

  FloatSVD (const FloatMatrix& a, octave_idx_type& info, SVD::type svd_type = SVD::std)
    {
      info = init (a, svd_type);
    }

  FloatSVD (const FloatSVD& a)
    : type_computed (a.type_computed),
      sigma (a.sigma), left_sm (a.left_sm), right_sm (a.right_sm) { }

  FloatSVD& operator = (const FloatSVD& a)
    {
      if (this != &a)
        {
          type_computed = a.type_computed;
          sigma = a.sigma;
          left_sm = a.left_sm;
          right_sm = a.right_sm;
        }

      return *this;
    }

  ~FloatSVD (void) { }

  FloatDiagMatrix singular_values (void) const { return sigma; }

  FloatMatrix left_singular_matrix (void) const;

  FloatMatrix right_singular_matrix (void) const;

  friend std::ostream&  operator << (std::ostream& os, const FloatSVD& a);

private:

  SVD::type type_computed;

  FloatDiagMatrix sigma;
  FloatMatrix left_sm;
  FloatMatrix right_sm;

  octave_idx_type init (const FloatMatrix& a, SVD::type svd_type = SVD::std);
};

#endif

/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/