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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_NLEqn_h)
#define octave_NLEqn_h 1
#if defined (__GNUG__)
#pragma interface
#endif
#include <cfloat>
#include <cmath>
#include "dColVector.h"
#include "NLFunc.h"
class
NLEqn_options
{
public:
NLEqn_options (void)
: x_tolerance (::sqrt (DBL_EPSILON)) { }
NLEqn_options (const NLEqn_options& opt)
: x_tolerance (opt.x_tolerance) { }
NLEqn_options& operator = (const NLEqn_options& opt)
{
if (this != &opt)
x_tolerance = opt.x_tolerance;
return *this;
}
~NLEqn_options (void) { }
void set_default_options (void) { x_tolerance = ::sqrt (DBL_EPSILON); }
void set_options (const NLEqn_options& opt)
{ x_tolerance = opt.x_tolerance; }
void set_tolerance (double val)
{ x_tolerance = (val > 0.0) ? val : ::sqrt (DBL_EPSILON); }
double tolerance (void) { return x_tolerance; }
private:
double x_tolerance;
};
class
NLEqn : public NLFunc, public NLEqn_options
{
public:
NLEqn (void)
: NLFunc (), NLEqn_options (), x () { }
NLEqn (const ColumnVector& xx, const NLFunc f)
: NLFunc (f), NLEqn_options (), x (xx) { }
NLEqn (const NLEqn& a)
: NLFunc (a.fun, a.jac), NLEqn_options (), x (a.x) { }
NLEqn& operator = (const NLEqn& a)
{
if (this != &a)
{
NLFunc::operator = (a);
NLEqn_options::operator = (a);
x = a.x;
}
return *this;
}
~NLEqn (void) { }
void set_states (const ColumnVector& xx) { x = xx; }
ColumnVector states (void) const { return x; }
int size (void) const { return x.capacity (); }
ColumnVector solve (void)
{
int info;
return solve (info);
}
ColumnVector solve (const ColumnVector& xvec)
{
set_states (xvec);
int info;
return solve (info);
}
ColumnVector solve (const ColumnVector& xvec, int& info)
{
set_states (xvec);
return solve (info);
}
ColumnVector solve (int& info);
private:
ColumnVector x;
void error (const char* msg);
};
#endif
/*
;;; Local Variables: ***
;;; mode: C++ ***
;;; End: ***
*/
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