std::gamma_distribution

Defined in header <random>
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

Member types

Member type	Definition
result_type	RealType
param_type	the type of the parameter set, unspecified

Member functions

Template:cpp/numeric/random/distribution/dcl list constructorTemplate:cpp/numeric/random/distribution/dcl list resetTemplate:cpp/numeric/random/distribution/dcl list operator()Template:cpp/numeric/random/gamma distribution/dcl list alphaTemplate:cpp/numeric/random/gamma distribution/dcl list betaTemplate:cpp/numeric/random/distribution/dcl list paramTemplate:cpp/numeric/random/distribution/dcl list minTemplate:cpp/numeric/random/distribution/dcl list max

Generation

Characteristics

Non-member functions

Template:cpp/numeric/random/distribution/dcl list operator cmpTemplate:cpp/numeric/random/distribution/dcl list operator ltltgtgt

External links

Weisstein, Eric W. "Gamma Distribution." From MathWorld--A Wolfram Web Resource.