Developer Reference

  • 2020.2
  • 07/15/2020
  • Public Content
Contents

?larnv

Returns a vector of random numbers from a uniform or normal distribution.

Syntax

call slarnv
(
idist
,
iseed
,
n
,
x
)
call dlarnv
(
idist
,
iseed
,
n
,
x
)
call clarnv
(
idist
,
iseed
,
n
,
x
)
call zlarnv
(
idist
,
iseed
,
n
,
x
)
Include Files
  • mkl.fi
Description
The routine
?larnv
returns a vector of
n
random real/complex numbers from a uniform or normal distribution.
This routine calls the auxiliary routine
?laruv
to generate random real numbers from a uniform (0,1) distribution, in batches of up to 128 using vectorisable code. The Box-Muller method is used to transform numbers from a uniform to a normal distribution.
Input Parameters
The data types are given for the Fortran interface.
idist
INTEGER
.
Specifies the distribution of the random numbers: for
slarnv
and
dlarnv
:
= 1: uniform (0,1)
= 2: uniform (-1,1)
= 3: normal (0,1).
for
clarnv
and
zlarnv
:
= 1: real and imaginary parts each uniform (0,1)
= 2: real and imaginary parts each uniform (-1,1)
= 3: real and imaginary parts each normal (0,1)
= 4: uniformly distributed on the disc abs(z) < 1
= 5: uniformly distributed on the circle abs(z) = 1
iseed
INTEGER
.
Array, size (4).
On entry, the seed of the random number generator; the array elements must be between 0 and 4095, and
iseed
(4) must be odd.
n
INTEGER
.
The number of random numbers to be generated.
Output Parameters
x
REAL
for
slarnv
DOUBLE PRECISION
for
dlarnv
COMPLEX
for
clarnv
DOUBLE COMPLEX
for
zlarnv
Array, size (
n
). The generated random numbers.
iseed
On exit, the seed is updated.

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804