DLARUV (3) Linux Manual Page

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, integerN, 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.

Date:

September 2012

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 96 of file dlaruv.f.

Author

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