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SLARUV(l) ) SLARUV(l)
SLARUV - return a vector of n random real numbers from a uniform (0,1)
SUBROUTINE SLARUV( ISEED, N, X )
INTEGER ISEED( 4 )
REAL X( N )
SLARUV returns a vector of n random real numbers from a uniform (0,1) distribution (n <=
This is an auxiliary routine called by SLARNV and CLARNV.
ISEED (input/output) 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 (input) INTEGER
The number of random numbers to be generated. N <= 128.
X (output) REAL array, dimension (N)
The generated random numbers.
This routine uses a multiplicative congruential method with modulus 2**48 and multiplier
33952834046453 (see G.S.Fishman,
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.
LAPACK version 3.0 15 June 2000 SLARUV(l)
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