laruv(3)

NAME
laruv - laruv: random uniform vector

SYNOPSIS

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

Detailed Description

Function 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 94 of file dlaruv.f.

  subroutine slaruv (integer, dimension( 4 ) iseed, integer n, real, dimension( n ) x)

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

Purpose:

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

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 REAL 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 94 of file slaruv.f.

Author

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