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SRC/lapack_64_obj/dlaruv.f(3) Library Functions Manual SRC/lapack_64_obj/dlaruv.f(3)

NAME

SRC/lapack_64_obj/dlaruv.f

SYNOPSIS

Functions/Subroutines


subroutine DLARUV (iseed, n, x)
DLARUV returns a vector of n random real numbers from a uniform distribution.

Function/Subroutine Documentation

subroutine DLARUV (integer, dimension( 4 ) iseed, integer n, double precision, dimension( n ) x)

DLARUV returns a vector of n random real numbers from a uniform distribution.

Purpose:

!>
!> DLARUV returns a vector of n random real numbers from a uniform (0,1)
!> distribution (n <= 128).
!>
!> This is an auxiliary routine called by DLARNV and ZLARNV.
!>

Parameters

ISEED 

!>          ISEED is 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

!>          N is INTEGER
!>          The number of random numbers to be generated. N <= 128.
!>

X

!>          X is DOUBLE PRECISION array, dimension (N)
!>          The generated random numbers.
!>

Author

Univ. of Tennessee

Univ. of California Berkeley

Univ. of Colorado Denver

NAG Ltd.

Further Details:

!>
!>  This routine uses a multiplicative congruential method with modulus
!>  2**48 and multiplier 33952834046453 (see G.S.Fishman,
!>  'Multiplicative congruential random number generators with modulus
!>  2**b: an exhaustive analysis for b = 32 and a partial analysis for
!>  b = 48', Math. Comp. 189, pp 331-344, 1990).
!>
!>  48-bit integers are stored in 4 integer array elements with 12 bits
!>  per element. Hence the routine is portable across machines with
!>  integers of 32 bits or more.
!>

Definition at line 95 of file dlaruv.f.

Author

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Version 3.12.1 LAPACK