VavilovAccurateQuantile.cxx

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// @(#)root/mathmore:$Id$
// Authors: B. List 29.4.2010


 /**********************************************************************
  *                                                                    *
  * 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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  * This library is distributed in the hope that it will be useful,    *
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// Implementation file for class VavilovAccurateQuantile
//
// Created by: blist  at Thu Apr 29 11:19:00 2010
//
// Last update: Thu Apr 29 11:19:00 2010
//

#include "Math/VavilovAccurateQuantile.h"
#include "Math/VavilovAccurate.h"

namespace ROOT {
namespace Math {


VavilovAccurateQuantile::VavilovAccurateQuantile() {
   fP[0] = 1;
   fP[1] = 0;
   fP[2] = 1;
   fP[3] = 1;
   fP[4] = 1;
}

VavilovAccurateQuantile::VavilovAccurateQuantile(const double *p) {
   if (p)
      for (int i = 0; i < 5; ++i)
         fP[i] = p[i];
   else {
      fP[0] = 1;
      fP[1] = 0;
      fP[2] = 1;
      fP[3] = 1;
      fP[4] = 1;
   }
}

VavilovAccurateQuantile::~VavilovAccurateQuantile ()
{}

const double * VavilovAccurateQuantile::Parameters() const {
   return fP;
}

void VavilovAccurateQuantile::SetParameters(const double * p ) {
      if (p)
         for (int i = 0; i < 5; ++i)
            fP[i] = p[i];
}

unsigned int VavilovAccurateQuantile::NPar() const {
  return 5;
}

std::string VavilovAccurateQuantile::ParameterName(unsigned int i) const {
   switch (i) {
     case 0: return "Norm"; break;
     case 1: return "x0"; break;
     case 2: return "xi"; break;
     case 3: return "kappa"; break;
     case 4: return "beta2"; break;
   }
   return "???";
}

double VavilovAccurateQuantile::DoEval(double x) const {
   VavilovAccurate v(fP[3], fP[4]);
   return fP[1] + fP[2]*v.Quantile (x/fP[0]);
}

double VavilovAccurateQuantile::DoEvalPar(double x, const double * p) const {
   if (!p) return 0;
   // p[0]: norm, p[1]: x0, p[2]: width, p[3]: kappa, p[4]: beta2
   VavilovAccurate v(p[3], p[4]);
   return p[1]+p[2]*v.Quantile (x/p[0]);
}

IBaseFunctionOneDim  * VavilovAccurateQuantile::Clone() const {
  return new VavilovAccurateQuantile (*this);
}


} // namespace Math
} // namespace ROOT