Interpolator.cxx

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// @(#)root/mathmore:$Id$
// Authors: L. Moneta, A. Zsenei   08/2005
 
 /**********************************************************************
  *                                                                    *
  * Copyright (c) 2004 ROOT Foundation,  CERN/PH-SFT                   *
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  * This library is free software; you can redistribute it and/or      *
  * modify it under the terms of the GNU General Public License        *
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// Implementation file for class Interpolator using GSL
//
// Created by: moneta  at Fri Nov 26 15:00:25 2004
//
// Last update: Fri Nov 26 15:00:25 2004
//
 
#include "Math/Interpolator.h"
#include "GSLInterpolator.h"
#include <algorithm>
 
 
namespace ROOT {
namespace Math {
 
Interpolator::Interpolator(unsigned int ndata, Interpolation::Type type ) {
   // allocate GSL interpolation object
   fInterp = new GSLInterpolator(ndata, type);
}
 
Interpolator::Interpolator(const std::vector<double> & x, const std::vector<double> & y, Interpolation::Type type)
{
   // allocate and initialize GSL interpolation object with data
 
   size_t size = std::min( x.size(), y.size() );
 
   fInterp = new GSLInterpolator(size, type);
 
   fInterp->Init(size, &x.front(), &y.front() );
 
}
 
 
Interpolator::~Interpolator()
{
   // destructor (delete underlined obj)
   if (fInterp) delete fInterp;
}
 
bool Interpolator::SetData(unsigned int ndata, const double * x, const double *y) {
   // set the interpolation data
   return fInterp->Init(ndata, x, y);
}
bool Interpolator::SetData(const std::vector<double> & x, const std::vector<double> &y) {
   // set the interpolation data
   size_t size = std::min( x.size(), y.size() );
   return fInterp->Init(size, &x.front(), &y.front());
}
 
 
double Interpolator::Eval( double x ) const
{
   // forward evaluation
   return fInterp->Eval(x);
}
 
double Interpolator::Deriv( double x ) const
{
   // forward deriv evaluation
   return fInterp->Deriv(x);
}
 
double Interpolator::Deriv2( double x ) const {
   // forward deriv evaluation
   return fInterp->Deriv2(x);
}
 
double Interpolator::Integ( double a, double b) const {
   // forward integ evaluation
   return fInterp->Integ(a,b);
}
 
std::string  Interpolator::TypeGet() const {
   // forward name request
   return fInterp->Name();
}
std::string  Interpolator::Type() const {
   // forward name request
   return fInterp->Name();
}
 
 
 
} // namespace Math
} // namespace ROOT