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Difference between revisions of "cpp/numeric/random/chi squared distribution"

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< cpp‎ | numeric‎ | random
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template< class RealType = double >
 
template< class RealType = double >
 
class chi_squared_distribution;
 
class chi_squared_distribution;

Revision as of 17:30, 9 July 2013

 
C++
 
Numerics library
Common mathematical functions
Mathematical special functions (C++17)
Mathematical constants (C++20)
Basic linear algebra algorithms (C++26)
Floating-point environment (C++11)
Complex numbers
Numeric array (valarray)
Pseudo-random number generation
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Generic numeric operations
Bit operations
(C++20)    
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Pseudo-random number generation
 
std::chi_squared_distribution
 
Defined in header <random>
template< class RealType = double >
class chi_squared_distribution;
 (since C++11)

The chi_squared_distribution produces random numbers x>0 according to the Chi-squared distribution:

f(x;n) =
x(n/2)-1 e-x/2
Γ(n/2) 2n/2

Γ is the Gamma function (See also std::tgamma) and n are the degrees of freedom (default 1).

Contents

Member types

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

Member functions

(C++11)
 constructs new distribution
(public member function) [edit]
(C++11)
 resets the internal state of the distribution
(public member function) [edit]
Generation
(C++11)
 generates the next random number in the distribution
(public member function) [edit]
Characteristics
(C++11)
 returns the degrees of freedom (n) distribution parameter
(public member function) [edit]
(C++11)
 gets or sets the distribution parameter object
(public member function) [edit]
(C++11)
 returns the minimum potentially generated value
(public member function) [edit]
(C++11)
 returns the maximum potentially generated value
(public member function) [edit]

Non-member functions

(C++11)(C++11)(removed in C++20)
 compares two distribution objects
(function) [edit]
(C++11)
 performs stream input and output on pseudo-random number distribution
(function template) [edit]

Example

This section is incomplete
Reason: no example

External links

Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/numeric/random/chi_squared_distribution&oldid=63372"