# dlaruv.f man 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, 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

Generated automatically by Doxygen for LAPACK from the source code.

## Referenced By

The man page dlaruv(3) is an alias of dlaruv.f(3).

Tue Nov 14 2017 Version 3.8.0 LAPACK