laruv - Man Page

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.

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.

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.