beta

oneMKL - Data Parallel C++ Developer Reference

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ID 772045

Date 10/31/2024

Version

Public

Visible to Intel only — GUID: GUID-FB83DA17-03C3-4B22-B674-47C3D54CB044

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beta

Generates Beta distributed random numbers.

Description
API

Description

The beta class object is used in the generate function to provide random numbers with beta distribution that has shape parameters and , displacement , and scale parameter , where , , , .

The probability density function is given by:

The cumulative distribution function is as follows:

Where is the complete beta function.

API

Syntax

namespace oneapi::mkl::rng::device {
  template<typename RealType, typename Method>
  class beta {
  public:
    using method_type = Method;
    using result_type = RealType;

    beta() : beta((RealType)1.0, (RealType)1.0, (RealType)0.0, (RealType)1.0){}
    explicit beta(RealType p, RealType q, RealType a, RealType b);
    explicit beta(const param_type& pt);

    RealType p() const;
    RealType q() const;
    RealType a() const;
    RealType b() const;
    param_type param() const;
    std::size_t count_rejected_numbers() const;
    void param(const param_type& pt);
  };
}

Include Files

oneapi/mkl/rng/device.hpp

Template Parameters

typename Type

Type of the produced values. The specific values are as follows:

float
double

typename Method

Generation method. The specific values are as follows:

oneapi::mkl::rng::device::beta_method::by_default
oneapi::mkl::rng::device::beta_method::cja
oneapi::mkl::rng::device::beta_method::cja_accurate

See brief descriptions of the methods in Distributions Template Parameter Method

NOTE:

To enable extra optimizations based on Vector Math functions, define the MKL_RNG_USE_BINARY_CODE macro and link static oneMKL libraries according to the output produced by Intel® oneAPI Math Kernel Library Link Line Advisor. It may improve performance on some hardware.

Input Parameters

Name	Type	Description
p	`RealType (float, double)`	Shape `p`.
q	`RealType (float, double)`	Shape `q`.
a	`RealType (float, double)`	Displacement .
b	`RealType (float, double)`	Scalefactor .

Special methods

std::size_t count_rejected_numbers() const

Returns the amount of random numbers that were rejected during the last generate function call. If no generate calls, returns 0.

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oneMKL - Data Parallel C++ Developer Reference

beta

Description

API