Developer Reference for Intel® oneAPI Math Kernel Library for Fortran

ID 766686
Date 3/22/2024
Public

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vRngUniform Discrete Distribution Generators

Generates random numbers uniformly distributed over the interval [a, b).

Syntax

status = virnguniform( method, stream, n, r, a, b )

Include Files

  • mkl.fi, mkl_vsl.f90

Input Parameters

Name

Type

Description

method

INTEGER, INTENT(IN)

Generation method; the specific value is as follows:

VSL_RNG_METHOD_UNIFORM_STD

Standard method. Currently there is only one method for this distribution generator.

stream

TYPE (VSL_STREAM_STATE), INTENT(IN)

Descriptor of the stream state structure.

n

INTEGER, INTENT(IN)

Number of random values to be generated

a

INTEGER(KIND=4), INTENT(IN)

Left interval bound a

b

INTEGER(KIND=4), INTENT(IN)

Right interval bound b

Output Parameters

Name

Type

Description

r

INTEGER(KIND=4), INTENT(OUT)

Vector of n random numbers uniformly distributed over the interval [a,b)

Description

The vRngUniform function generates random numbers uniformly distributed over the interval [a, b), where a, b are the left and right bounds of the interval respectively, and a, bZ; a < b.

The probability distribution is given by:


Equation

The cumulative distribution function is as follows:


Equation

Product and Performance Information

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.

Notice revision #20201201

Return Values

VSL_ERROR_OK, VSL_STATUS_OK

Indicates no error, execution is successful.

VSL_ERROR_NULL_PTR

stream is a NULL pointer.

VSL_RNG_ERROR_BAD_STREAM

stream is not a valid random stream.

VSL_RNG_ERROR_BAD_UPDATE

Callback function for an abstract BRNG returns an invalid number of updated entries in a buffer, that is, < 0 or > nmax.

VSL_RNG_ERROR_NO_NUMBERS

Callback function for an abstract BRNG returns 0 as the number of updated entries in a buffer.

VSL_RNG_ERROR_QRNG_PERIOD_ELAPSED

Period of the generator has been exceeded.

VSL_RNG_ERROR_NONDETERM_NRETRIES_EXCEEDED

Number of retries to generate a random number by using non-deterministic random number generator exceeds threshold.

VSL_RNG_ERROR_ARS5_NOT_SUPPORTED

ARS-5 random number generator is not supported on the CPU running the application.