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/*
Copyright (C) 1996 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 2, 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, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#if !defined (octave_DiagMatrix_h)
#define octave_DiagMatrix_h 1
#if defined (__GNUG__)
#pragma interface
#endif
#include "MDiagArray2.h"
#include "dRowVector.h"
#include "dColVector.h"
#include "mx-defs.h"
class DiagMatrix : public MDiagArray2<double>
{
friend class SVD;
friend class ComplexSVD;
public:
DiagMatrix (void) : MDiagArray2<double> () { }
DiagMatrix (int r, int c) : MDiagArray2<double> (r, c) { }
DiagMatrix (int r, int c, double val) : MDiagArray2<double> (r, c, val) { }
DiagMatrix (const RowVector& a) : MDiagArray2<double> (a) { }
DiagMatrix (const ColumnVector& a) : MDiagArray2<double> (a) { }
DiagMatrix (const MDiagArray2<double>& a) : MDiagArray2<double> (a) { }
DiagMatrix (const DiagMatrix& a) : MDiagArray2<double> (a) { }
DiagMatrix& operator = (const DiagMatrix& a)
{
MDiagArray2<double>::operator = (a);
return *this;
}
bool operator == (const DiagMatrix& a) const;
bool operator != (const DiagMatrix& a) const;
DiagMatrix& fill (double val);
DiagMatrix& fill (double val, int beg, int end);
DiagMatrix& fill (const ColumnVector& a);
DiagMatrix& fill (const RowVector& a);
DiagMatrix& fill (const ColumnVector& a, int beg);
DiagMatrix& fill (const RowVector& a, int beg);
DiagMatrix transpose (void) const;
friend DiagMatrix real (const ComplexDiagMatrix& a);
friend DiagMatrix imag (const ComplexDiagMatrix& a);
// resize is the destructive analog for this one
Matrix extract (int r1, int c1, int r2, int c2) const;
// extract row or column i.
RowVector row (int i) const;
RowVector row (char *s) const;
ColumnVector column (int i) const;
ColumnVector column (char *s) const;
DiagMatrix inverse (void) const;
DiagMatrix inverse (int& info) const;
// diagonal matrix by diagonal matrix -> diagonal matrix operations
DiagMatrix& operator += (const DiagMatrix& a);
DiagMatrix& operator -= (const DiagMatrix& a);
// diagonal matrix by diagonal matrix -> diagonal matrix operations
friend DiagMatrix operator * (const DiagMatrix& a,
const DiagMatrix& b);
// other operations
ColumnVector diag (void) const;
ColumnVector diag (int k) const;
// i/o
friend ostream& operator << (ostream& os, const DiagMatrix& a);
private:
DiagMatrix (double *d, int nr, int nc) : MDiagArray2<double> (d, nr, nc) { }
};
#endif
/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/
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