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dlaruv.f(3) LAPACK dlaruv.f(3)

NAME

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.

Date:

December 2016

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 97 of file dlaruv.f.

Author

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Tue Nov 14 2017 Version 3.8.0