STK_Funct_gammaRatio.h

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/*--------------------------------------------------------------------*/
/*  Copyright (C) 2004-2016  Serge Iovleff, Université Lille 1, Inria
    
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as
    published by the Free Software Foundation; either version 2 of the
    License, or (at your option) any later version.
    
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.
    
    You should have received a copy of the GNU Lesser General Public
    License along with this program; if not, write to the
    Free Software Foundation, Inc.,
    59 Temple Place,
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    USA
    
    Contact : S..._Dot_I..._At_stkpp_Dot_org (see copyright for ...)
*/
 
/*
 * Project:  Analysis
 * Purpose:  Declaration of functions around the gamma function rqtio
 * Author:   Serge Iovleff, S..._Dot_I..._At_stkpp_Dot_org (see copyright for ...)
 **/
 
#ifndef STK_FUNCT_GAMMARATIO_H
#define STK_FUNCT_GAMMARATIO_H
 
#include <STKernel.h>
 
namespace STK
{
 
namespace Funct
{
 
#ifdef IS_RTKPP_LIBRARY
 
inline Real gammaRatio(Real const& a, Real const& x, bool lower_tail)
{ return Rf_pgamma(x, a, 1., lower_tail, false);}
 
#else
 
Real gammaRatio_raw(Real const& a, Real const& x, bool lower_tail);
 
inline Real gammaRatioQ_raw(Real const& a, Real const& x)
{ return gammaRatio_raw(a, x, false);}
 
inline Real gammaRatioP_raw(Real const& a, Real const& x)
{ return gammaRatio_raw(a, x, true);}
 
#endif
 
Real gammaRatio(Real const& a, Real const& x, bool lower_tail);
 
inline Real gammaRatioQ(Real const& a, Real const& x)
{ return gammaRatio(a, x, false);}
 
inline Real gammaRatioP(Real const& a, Real const& x)
{ return gammaRatio(a, x, true);}
 
} // namespace Funct
 
} // namespace STK
  
#endif /*STK_FUNCT_GAMMARATIO_H*/