std::gamma_distribution
From cppreference.com
Defined in header <random>
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template< class RealType = double > class gamma_distribution; |
(since C++11) | |
Produces random positive integer values x, distributed according to probability density function:
- P(x|α,β) =
e-x/β βα
· Γ(α)
where α is known as the shape parameter and β is known as the scale parameter.
For integer α, the value obtained is the sum of α independent exponentially distributed random variables, each of which has a mean of β
Contents |
[edit] Member types
Member type | Definition |
result_type | RealType |
param_type | the type of the parameter set, unspecified |
[edit] Member functions
constructs new distribution (public member function) | |
resets the internal state of the distribution (public member function) | |
Generation | |
generates the next random number in the distribution (public member function) | |
Characteristics | |
returns the α distribution parameter (shape) (public member function) | |
returns the β distribution parameter (scale) (public member function) | |
gets or sets the distribution parameter object (public member function) | |
returns the minimum potentially generated value (public member function) | |
returns the maximum potentially generated value (public member function) |
[edit] Non-member functions
compares two distribution objects (function) | |
performs stream input and output on pseudo-random number distribution (function) |
[edit] Example
This section is incomplete Reason: no example |
[edit] External links
Weisstein, Eric W. "Gamma Distribution." From MathWorld--A Wolfram Web Resource.