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62 lines
2.3 KiB
C++
62 lines
2.3 KiB
C++
// $Id: generalGammaDistribution.h 3044 2007-12-18 15:54:50Z itaymay $
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#ifndef ___GENERAL_GAMMA_DIST
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#define ___GENERAL_GAMMA_DIST
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/************************************************************
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This distribution can take several forms depending on its free parameters alpha,beta
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(unalike gammaDist. alpha is not necessarily equal to beta).
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For an extensive exlpanation of this distribution
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see http://mathworld.wolfram.com/GammaDistribution.html
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************************************************************/
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#include "definitions.h"
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#include "distribution.h"
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enum quadratureType {QUANTILE, LAGUERRE};
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class generalGammaDistribution : public distribution {
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public:
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explicit generalGammaDistribution();
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explicit generalGammaDistribution(MDOUBLE alpha, MDOUBLE beta, int in_number_of_categories);
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explicit generalGammaDistribution(const generalGammaDistribution& other);
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virtual ~generalGammaDistribution() {}
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virtual distribution* clone() const { return new generalGammaDistribution(*this); }
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virtual void setGammaParameters(int numOfCategories ,MDOUBLE alpha, MDOUBLE beta);
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virtual const int categories() const {return _rates.size();}
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virtual const MDOUBLE rates(const int i) const {return _rates[i]*_globalRate;}
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virtual const MDOUBLE ratesProb(const int i) const {return _ratesProb[i];}
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virtual void setGlobalRate(const MDOUBLE x) {_globalRate = x;}
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virtual MDOUBLE getGlobalRate()const {return _globalRate;}
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virtual const MDOUBLE getCumulativeProb(const MDOUBLE x) const;
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virtual void setAlpha(MDOUBLE newAlpha);
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virtual MDOUBLE getAlpha() const {return _alpha;}
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virtual void setBeta(MDOUBLE newBeta);
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virtual MDOUBLE getBeta() const {return _beta;}
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virtual void change_number_of_categories(int in_number_of_categories);
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virtual MDOUBLE getBorder(const int i) const {return _bonderi[i];} //return the ith border. Note: _bonderi[0] = 0, _bondery[categories()] = infinite
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virtual Vdouble getBorders() const {return _bonderi;}
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virtual Vdouble getRates() const {return _rates;}
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protected:
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virtual void fill_mean();
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virtual void fill_bonderi();
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protected:
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MDOUBLE _alpha;
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MDOUBLE _beta;
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vector<MDOUBLE> _rates;
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vector<MDOUBLE> _ratesProb;
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MDOUBLE _globalRate;
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vector<MDOUBLE> _bonderi; //Note: _bonderi[0] = 0, _bondery[categories()] = infinite
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};
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#endif
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