Chi2Distribution.hpp

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#pragma ident "$Id: Chi2Distribution.hpp 1409 2008-09-24 16:56:22Z architest $"

#ifndef CHI2DISTRIBUTION_HPP
#define CHI2DISTRIBUTION_HPP

//============================================================================
//
//  This file is part of GPSTk, the GPS Toolkit.
//
//  The GPSTk 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 2.1 of the License, or
//  any later version.
//
//  The GPSTk 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 GPSTk; if not, write to the Free Software Foundation,
//  Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
//  Dagoberto Salazar - gAGE ( http://www.gage.es ). 2008
//
//============================================================================


#include "BaseDistribution.hpp"


namespace gpstk
{


   class Chi2Distribution : public BaseDistribution
   {
   public:


      Chi2Distribution() : ndf(2) {};


      Chi2Distribution( int n )
      { setNDF(n); };


      virtual double pdf(double x);


      virtual double pdf(double x, int n)
      { setNDF(n); return pdf(x); };


      virtual double cdf(double x);


      virtual double cdf(double x, int n)
      { setNDF(n); return cdf(x); };


      virtual double Q(double x)
      { return ( 1.0 - cdf(x) ); };


      virtual double Q(double x, int n)
      { return ( 1.0 - cdf(x,n) ); };


      virtual double getNDF(void) const
      { return ndf; };


      virtual Chi2Distribution& setNDF(int n)
         throw(InvalidParameter);


   private:


      int ndf;


   };  // End of class "Chi2Distribution"


}  // End of namespace gpstk
#endif   // CHI2DISTRIBUTION_HPP

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