libstdc++
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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 > | |
normal_distribution< _RealType > ::result_type | operator() (_UniformRandomNumberGenerator &__urng) |
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) |
A normal continuous distribution for random numbers.
The formula for the normal probability mass function is .
Definition at line 1854 of file tr1_impl/random.
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inlineexplicit |
Constructs a normal distribution with parameters and
.
Definition at line 2244 of file tr1_impl/random.
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inline |
Gets the mean of the distribution.
Definition at line 2255 of file tr1_impl/random.
normal_distribution<_RealType>::result_type std::normal_distribution< _RealType >::operator() | ( | _UniformRandomNumberGenerator & | __urng | ) |
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 1390 of file random.tcc.
References std::log(), and std::sqrt().
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inline |
Resets the distribution.
Definition at line 2269 of file tr1_impl/random.
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inline |
Gets the of the distribution.
Definition at line 2262 of file tr1_impl/random.
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friend |
Inserts a normal_distribution random number distribution __x
into the output stream __os
.
__os | An output stream. |
__x | A normal_distribution random number distribution. |
__x
inserted or in an error state.
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friend |
Extracts a normal_distribution random number distribution __x
from the input stream __is
.
__is | An input stream. |
__x | A normal_distribution random number generator engine. |
__x
extracted or in an error state.