DirichletDiscreteDistribution.h

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//
// File: DirichletDiscreteDistribution.h
// Authors:
//   Laurent Guéguen
// Created: jeudi 2 septembre 2010, à 17h 03
//
 
/*
  Copyright or © or Copr. Bio++ Development Team, (November 19, 2004)
  
  This software is a computer program whose purpose is to provide classes
  for numerical calculus.
  
  This software is governed by the CeCILL license under French law and
  abiding by the rules of distribution of free software. You can use,
  modify and/ or redistribute the software under the terms of the CeCILL
  license as circulated by CEA, CNRS and INRIA at the following URL
  "http://www.cecill.info".
  
  As a counterpart to the access to the source code and rights to copy,
  modify and redistribute granted by the license, users are provided only
  with a limited warranty and the software's author, the holder of the
  economic rights, and the successive licensors have only limited
  liability.
  
  In this respect, the user's attention is drawn to the risks associated
  with loading, using, modifying and/or developing or reproducing the
  software by the user in light of its specific status of free software,
  that may mean that it is complicated to manipulate, and that also
  therefore means that it is reserved for developers and experienced
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*/
 
#ifndef BPP_NUMERIC_PROB_DIRICHLETDISCRETEDISTRIBUTION_H
#define BPP_NUMERIC_PROB_DIRICHLETDISCRETEDISTRIBUTION_H
 
 
#include "../../Exceptions.h"
#include "../../Io/OutputStream.h"
#include "../ParameterAliasable.h"
#include "../VectorTools.h"
#include "BetaDiscreteDistribution.h"
#include "MultipleDiscreteDistribution.h"
 
namespace bpp
{
class DirichletDiscreteDistribution :
  public MultipleDiscreteDistribution,
  public AbstractParameterAliasable
{
private:
  std::vector<BetaDiscreteDistribution* > vpBDD_;
 
public:
  DirichletDiscreteDistribution(std::vector<size_t> vn, Vdouble valpha);
 
  ~DirichletDiscreteDistribution();
 
  DirichletDiscreteDistribution* clone() const
  {
    return new DirichletDiscreteDistribution(*this);
  }
 
protected:
  void applyParameters();
 
public:
  std::string getName() const {return "Dirichlet";}
 
  void fireParameterChanged(const ParameterList& parameters);
 
  size_t getNumberOfCategories() const;
 
  Vdouble getValueCategory(Vdouble& Vvalue) const;
 
  VVdouble getCategories() const;
 
  virtual double getProbability(Vdouble& category) const;
 
  Vdouble rand() const;
 
  Vdouble randC() const;
 
protected:
  void discretize(Vdouble& valpha);
};
} // end of namespace bpp.
#endif // BPP_NUMERIC_PROB_DIRICHLETDISCRETEDISTRIBUTION_H