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 floating-point values x, distributed according to probability density function:
- P(x|α,β) =
· xα-1e-x/β βα
· Γ(α)
where α is known as the shape parameter and β is known as the scale parameter.
For floating-point 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 distribution parameters (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.