Fisher.h

#ifndef _theplu_yat_statistics_fisher_
#define _theplu_yat_statistics_fisher_

// $Id: Fisher.h 3004 2013-03-24 00:51:14Z peter $

/*
  Copyright (C) 2004, 2005 Peter Johansson
  Copyright (C) 2006, 2007, 2008 Jari Häkkinen, Peter Johansson
  Copyright (C) 2009, 2011, 2013 Peter Johansson

  This file is part of the yat library, http://dev.thep.lu.se/yat

  The yat library is free software; you can redistribute it and/or
  modify it under the terms of the GNU General Public License as
  published by the Free Software Foundation; either version 3 of the
  License, or (at your option) any later version.

  The yat library 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
  General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with yat. If not, see <http://www.gnu.org/licenses/>.
*/

#include <yat/utility/deprecate.h>

namespace theplu {
namespace yat {
namespace statistics {

  class Fisher
  {

  public:
    Fisher(void);

    virtual ~Fisher(void);


    double Chi2(void) const;

    void expected(double& a, double& b, double& c, double& d) const;

    unsigned int& minimum_size(void);

    const unsigned int& minimum_size(void) const;

    double p_left(void) const;

    double p_right(void) const;

    double p_value(void) const;

    double p_value_one_sided() const YAT_DEPRECATE;

    double oddsratio(const unsigned int a, const unsigned int b,
                     const unsigned int c, const unsigned int d);

    double oddsratio(void) const;

  private:
    bool calculate_p_exact(void) const;

    // two-sided
    double p_value_approximative(void) const;
    double p_left_exact(void) const;
    double p_right_exact(void) const;
    //two-sided
    double p_value_exact(void) const;

    unsigned int a_;
    unsigned int b_;
    unsigned int c_;
    unsigned int d_;
    unsigned int minimum_size_;
    double oddsratio_;
  };

}}} // of namespace statistics, yat, and theplu

#endif