ConstantF.cxx

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/*
 * HippoPlot ConstantF class implementation
 *
 * Copyright (C) 2000, 2001, 2003   The Board of Trustees of The Leland
 * Stanford Junior University.  All Rights Reserved.
 *
 * $Id: ConstantF.cxx,v 1.34 2003/02/23 19:16:44 pfkeb Exp $
 *
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#else
#ifdef _MSC_VER
#include "msdevstudio/MSconfig.h"
#endif
#endif

#include "ConstantF.h"

#include "FunctionHelper.h"

#include <cassert>

#ifdef ITERATOR_MEMBER_DEFECT
using namespace std;
#else
using std::vector;
#endif

ConstantF::ConstantF ( )
{
  initialize ();
}

ConstantF::ConstantF ( double value )
{
  initialize ();

  m_parms[0] = value;
}

void ConstantF::initialize ()
{
  m_name = "Constant";
  m_parm_names.push_back ( "value" );

  resize ();
}

FunctionBase * ConstantF::clone () const
{
  return new ConstantF ( *this );
}

double ConstantF::operator () ( double x ) const
{
  return m_parms[0];
}

/* virtual */
void 
ConstantF::
initialParameters ( const FunctionHelper * helper )
{
  m_parms[0] = helper->meanValue ();
}

double ConstantF::derivByParm ( int i, double x ) const
{
  assert ( i == 0 );

  return 1.0;
}

---