Boost C++ Libraries Home Libraries People FAQ More

PrevUpHomeNext

Class template negative_binomial_distribution

boost::random::negative_binomial_distribution

Synopsis

// In header: <boost/random/negative_binomial_distribution.hpp>

template<typename IntType, typename RealType> 
class negative_binomial_distribution {
public:
  // types
  typedef IntType  ;
  typedef RealType ; 

  // member classes/structs/unions

  class param_type {
  public:
    // types
    typedef negative_binomial_distribution ;

    // public member functions
    (IntType = , RealType = );
    IntType () ;
    RealType () ;

    // friend functions
    template<typename CharT, typename Traits> 
      CharT, Traits > & 
      (CharT, Traits > &, const  param_type &);
    template<typename CharT, typename Traits> 
      CharT, Traits > & 
      (CharT, Traits > &, param_type &);
    bool (const  param_type &, const  param_type &);
    bool (const  param_type &, const  param_type &);
  };

  // public member functions
  (IntType = , RealType = );
  (const  param_type &);
  template<typename URNG> IntType (URNG &) ;
  template<typename URNG> 
    IntType (URNG &, const  param_type &) ;
  IntType () ;
  RealType () ;
  IntType () ;
  IntType () ;
  param_type () ;
  void (const  param_type &);
  void ();

  // friend functions
  template<typename CharT, typename Traits> 
    CharT, Traits > & 
    (CharT, Traits > &, 
               const  negative_binomial_distribution &);
  template<typename CharT, typename Traits> 
    CharT, Traits > & 
    (CharT, Traits > &, 
               negative_binomial_distribution &);
  bool (const  negative_binomial_distribution &, 
                  const  negative_binomial_distribution &);
  bool (const  negative_binomial_distribution &, 
                  const  negative_binomial_distribution &);
};

Description

The negative binomial distribution is an integer valued distribution with two parameters, k and p. The distribution produces non-negative values.

The distribution function is .

This implementation uses a gamma-poisson mixture.

negative_binomial_distribution public member functions

  1. (IntType k = , RealType p = );

    Construct a negative_binomial_distribution object. k and p are the parameters of the distribution.

    Requires: k >=0 && 0 <= p <= 1

  2. (const  param_type & param);

    Construct an negative_binomial_distribution object from the parameters.

  3. template<typename URNG> IntType (URNG & urng) ;

    Returns a random variate distributed according to the negative binomial distribution.

  4. template<typename URNG> 
      IntType (URNG & urng, const  param_type & param) ;

    Returns a random variate distributed according to the negative binomial distribution with parameters specified by param.

  5. IntType () ;

    Returns the k parameter of the distribution.

  6. RealType () ;

    Returns the p parameter of the distribution.

  7. IntType () ;

    Returns the smallest value that the distribution can produce.

  8. IntType () ;

    Returns the largest value that the distribution can produce.

  9. param_type () ;

    Returns the parameters of the distribution.

  10. void (const  param_type & param);

    Sets parameters of the distribution.

  11. void ();

    Effects: Subsequent uses of the distribution do not depend on values produced by any engine prior to invoking reset.

negative_binomial_distribution friend functions

  1. template<typename CharT, typename Traits> 
      CharT, Traits > & 
      (CharT, Traits > & os, 
                 const  negative_binomial_distribution & bd);

    Writes the parameters of the distribution to a std::ostream.

  2. template<typename CharT, typename Traits> 
      CharT, Traits > & 
      (CharT, Traits > & is, 
                 negative_binomial_distribution & bd);

    Reads the parameters of the distribution from a std::istream.

  3. bool (const  negative_binomial_distribution & lhs, 
                    const  negative_binomial_distribution & rhs);

    Returns true if the two distributions will produce the same sequence of values, given equal generators.

  4. bool (const  negative_binomial_distribution & lhs, 
                    const  negative_binomial_distribution & rhs);

    Returns true if the two distributions could produce different sequences of values, given equal generators.


PrevUpHomeNext