std::tr1::normal_distribution3
Detailed Description
template<typename _RealType = double> class std::tr1::normal_distribution< _RealType >
The formula for the normal probability mass function is $ p(x) = ac{1}{igma qrt{2 i}} e^{- ac{{x - mean}^ {2}}{2 igma ^ {2}} } $.
Definition at line 2196 of file random.
Public Types
typedef _RealType input_type
typedef _RealType result_type
Public Member Functions
_RealType mean () const
normal_distribution (const result_type &__mean=result_type(0), const result_type &__sigma=result_type(1))
template<class _UniformRandomNumberGenerator> result_type operator() (_UniformRandomNumberGenerator &__urng)
void reset ()
_RealType sigma () const
Friends
template<typename _RealType1, typename _CharT, typename _Traits> std::basic_ostream< _CharT, _Traits > & operator<< (std::basic_ostream< _CharT, _Traits > &__os, const normal_distribution< _RealType1 > &__x)
template<typename _RealType1, typename _CharT, typename _Traits> std::basic_istream< _CharT, _Traits > & operator>> (std::basic_istream< _CharT, _Traits > &__is, normal_distribution< _RealType1 > &__x)
Constructor & Destructor Documentation
template<typename _RealType = double> std::tr1::normal_distribution< _RealType >::normal_distribution (const result_type & __mean = result_type(0), const result_type & __sigma = result_type(1)) [inline, explicit]
Constructs a normal distribution with parameters $ mean $ and $ igma $.
Definition at line 2209 of file random.
Member Function Documentation
template<typename _RealType = double> _RealType std::tr1::normal_distribution< _RealType >::mean () const [inline]
Gets the mean of the distribution.
Definition at line 2220 of file random.
template<typename _RealType> template<class _UniformRandomNumberGenerator> normal_distribution< _RealType >::result_type std::tr1::normal_distribution< _RealType >::operator() (_UniformRandomNumberGenerator & __urng) [inline]
Polar method due to Marsaglia.
Devroye, L. 'Non-Uniform Random Variates Generation.' Springer-Verlag, New York, 1986, Ch. V, Sect. 4.4.
Definition at line 1360 of file random.tcc.
template<typename _RealType = double> void std::tr1::normal_distribution< _RealType >::reset () [inline]
Resets the distribution.
Definition at line 2234 of file random.
template<typename _RealType = double> _RealType std::tr1::normal_distribution< _RealType >::sigma () const [inline]
Gets the $ igma $ of the distribution.
Definition at line 2227 of file random.