Namespaces
Variants
Views
Actions

std::gamma_distribution

From cppreference.com
< cpp‎ | numeric‎ | random
Revision as of 22:12, 11 February 2012 by Cubbi (Talk | contribs)

Template:cpp/numeric/random/gamma distribution/sidebar

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

Contents

Member types

Template:tdcl list begin Template:tdcl list hitem Template:tdcl list item Template:tdcl list item Template:tdcl list end

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

Example

Template:example cpp

External links

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

Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/numeric/random/gamma_distribution&oldid=18745"