Generates exponentially distributed random numbers.
Syntax
status = vsRngExponential( method, stream, n, r, a, beta );
status = vdRngExponential( method, stream, n, r, a, beta );
Include Files
- mkl.h
Input Parameters
Name |
Type |
Description |
|---|---|---|
method |
const MKL_INT |
Generation method. The specific values are as follows: VSL_RNG_METHOD_EXPONENTIAL_ICDFVSL_RNG_METHOD_EXPONENTIAL_ICDF_ACCURATE
Inverse cumulative distribution function method |
stream |
VSLStreamStatePtr |
Pointer to the stream state structure |
n |
const MKL_INT |
Number of random values to be generated |
a |
const float for vsRngExponential const double for vdRngExponential |
Displacement a |
beta |
const float for vsRngExponential const double for vdRngExponential |
Scalefactor β. |
Output Parameters
Name |
Type |
Description |
|---|---|---|
r |
float* for vsRngExponential double* for vdRngExponential |
Vector of n exponentially distributed random numbers |
Description
The vRngExponential function generates random numbers with exponential distribution that has displacement a and scalefactor β, where a, β∈R ; β > 0.
The probability density function is given by:
The cumulative distribution function is as follows:
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.