libstdc++
|
A normal continuous distribution for random numbers.
The formula for the normal probability density function is
typedef _RealType std::normal_distribution::result_type |
std::normal_distribution::normal_distribution | ( | result_type | __mean = result_type(0) , |
result_type | __stddev = result_type(1) |
||
) | [inline, explicit] |
result_type std::normal_distribution::max | ( | ) | const [inline] |
Returns the least upper bound value of the distribution.
Definition at line 2069 of file random.h.
Referenced by std::normal_distribution< result_type >::max().
_RealType std::normal_distribution::mean | ( | ) | const [inline] |
result_type std::normal_distribution::min | ( | ) | const [inline] |
Returns the greatest lower bound value of the distribution.
Definition at line 2062 of file random.h.
Referenced by std::normal_distribution< result_type >::min().
result_type std::normal_distribution::operator() | ( | _UniformRandomNumberGenerator & | __urng | ) | [inline] |
Generating functions.
Definition at line 2077 of file random.h.
Referenced by std::normal_distribution< result_type >::operator()().
normal_distribution< _RealType >::result_type std::normal_distribution::operator() | ( | _UniformRandomNumberGenerator & | __urng, |
const param_type & | __param | ||
) |
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 1649 of file random.tcc.
References std::sqrt(), and std::log().
param_type std::normal_distribution::param | ( | ) | const [inline] |
Returns the parameter set of the distribution.
Definition at line 2047 of file random.h.
Referenced by std::normal_distribution< result_type >::operator()().
void std::normal_distribution::param | ( | const param_type & | __param | ) | [inline] |
void std::normal_distribution::reset | ( | ) | [inline] |
Resets the distribution state.
Definition at line 2026 of file random.h.
Referenced by std::lognormal_distribution::reset(), std::gamma_distribution< result_type >::reset(), std::student_t_distribution::reset(), std::binomial_distribution::reset(), and std::poisson_distribution::reset().
_RealType std::normal_distribution::stddev | ( | ) | const [inline] |
std::basic_ostream<_CharT, _Traits>& operator<< | ( | std::basic_ostream< _CharT, _Traits > & | , |
const std::normal_distribution< _RealType1 > & | |||
) | [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. bool operator== | ( | const std::normal_distribution< _RealType1 > & | __d1, |
const std::normal_distribution< _RealType1 > & | __d2 | ||
) | [friend] |
Return true if two normal distributions have the same parameters and the sequences that would be generated are equal.
std::basic_istream<_CharT, _Traits>& operator>> | ( | std::basic_istream< _CharT, _Traits > & | , |
std::normal_distribution< _RealType1 > & | |||
) | [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.