slarnv (l) - Linux Man Pages

slarnv: returns a vector of n random real numbers from a uniform or normal distribution

NAME

SLARNV - returns a vector of n random real numbers from a uniform or normal distribution

SYNOPSIS

SUBROUTINE SLARNV(
IDIST, ISEED, N, X )

    
INTEGER IDIST, N

    
INTEGER ISEED( 4 )

    
REAL X( * )

PURPOSE

SLARNV returns a vector of n random real numbers from a uniform or normal distribution.

ARGUMENTS

IDIST (input) INTEGER
Specifies the distribution of the random numbers:
= 1: uniform (0,1)
= 2: uniform (-1,1)
= 3: normal (0,1)
ISEED (input/output) INTEGER array, dimension (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. On exit, the seed is updated.
N (input) INTEGER
The number of random numbers to be generated.
X (output) REAL array, dimension (N)
The generated random numbers.

FURTHER DETAILS

This routine calls the auxiliary routine SLARUV 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.