NAME

       std::exponential_distribution< _RealType > -

SYNOPSIS

   Public Types
       typedef _RealType input_type
       typedef _RealType result_type

   Public Member Functions
       exponential_distribution (const result_type &__lambda=result_type(1))
       _RealType lambda () const
       template<class _UniformRandomNumberGenerator > result_type operator() (_UniformRandomNumberGenerator
           &__urng)
       void reset ()

   Friends
       template<typename _RealType1 , typename _CharT , typename _Traits > std::basic_ostream< _CharT,
           _Traits > & operator<< (std::basic_ostream< _CharT, _Traits > &__os, const exponential_distribution<
           _RealType1 > &__x)"
       template<typename _CharT , typename _Traits > std::basic_istream< _CharT,
           _Traits > & operator>> (std::basic_istream< _CharT, _Traits > &__is, exponential_distribution &__x)"

Detailed Description

   template<typename _RealType = double>class std::exponential_distribution< _RealType >
       An exponential continuous distribution for random numbers.

       The formula for the exponential probability mass function is $ p(x) = bda e^{-bda x} $.

       Mean$ ac{1}{bda} $ Median$ ac{}}bda} $ Mode$ zero $ Range$[0, infty]$ Standard Deviation$ ac{1}{bda} $
       Distribution Statistics

       Definition at line 2148 of file tr1_impl/random.

Constructor & Destructor Documentation

   template<typename _RealType  = double> std::exponential_distribution< _RealType >::exponential_distribution
       (const result_type &__lambda = result_type(1)) [inline],  [explicit]
       Constructs an exponential distribution with inverse scale parameter $ bda $.

       Definition at line 2161 of file tr1_impl/random.

Member Function Documentation

   template<typename _RealType  = double> _RealType std::exponential_distribution< _RealType >::lambda () const
       [inline]
       Gets the inverse scale parameter of the distribution.

       Definition at line 2171 of file tr1_impl/random.

   template<typename _RealType  = double> void std::exponential_distribution< _RealType >::reset () [inline]
       Resets the distribution.

       Has no effect on exponential distributions.

       Definition at line 2180 of file tr1_impl/random.

Friends And Related Function Documentation

   template<typename _RealType  = double> template<typename _RealType1 , typename _CharT , typename _Traits >
       std::basic_ostream<_CharT, _Traits>& operator<< (std::basic_ostream< _CharT, _Traits > &__os, const
       exponential_distribution< _RealType1 > &__x) [friend]
       Inserts a exponential_distribution random number distribution __x into the output stream __os.

       Parameters:
           __os An output stream.
           __x A exponential_distribution random number distribution.

       Returns:
           The output stream with the state of __x inserted or in an error state.

   template<typename _RealType  = double> template<typename _CharT , typename _Traits >
       std::basic_istream<_CharT, _Traits>& operator>> (std::basic_istream< _CharT, _Traits > &__is,
       exponential_distribution< _RealType > &__x) [friend]
       Extracts a exponential_distribution random number distribution __x from the input stream __is.

       Parameters:
           __is An input stream.
           __x A exponential_distribution random number generator engine.

       Returns:
           The input stream with __x extracted or in an error state.

       Definition at line 2214 of file tr1_impl/random.

Author

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