home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
IRIX 6.2 Development Libraries
/
SGI IRIX 6.2 Development Libraries.iso
/
dist
/
complib.idb
/
usr
/
share
/
catman
/
p_man
/
cat3
/
complib
/
zlarnv.z
/
zlarnv
Wrap
Text File
|
1996-03-14
|
2KB
|
67 lines
ZZZZLLLLAAAARRRRNNNNVVVV((((3333FFFF)))) ZZZZLLLLAAAARRRRNNNNVVVV((((3333FFFF))))
NNNNAAAAMMMMEEEE
ZLARNV - return a vector of n random complex numbers from a uniform or
normal distribution
SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
SUBROUTINE ZLARNV( IDIST, ISEED, N, X )
INTEGER IDIST, N
INTEGER ISEED( 4 )
COMPLEX*16 X( * )
PPPPUUUURRRRPPPPOOOOSSSSEEEE
ZLARNV returns a vector of n random complex numbers from a uniform or
normal distribution.
AAAARRRRGGGGUUUUMMMMEEEENNNNTTTTSSSS
IDIST (input) INTEGER
Specifies the distribution of the random numbers:
= 1: real and imaginary parts each uniform (0,1)
= 2: real and imaginary parts each uniform (-1,1)
= 3: real and imaginary parts each normal (0,1)
= 4: uniformly distributed on the disc abs(z) < 1
= 5: uniformly distributed on the circle abs(z) = 1
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.
X (output) COMPLEX*16 array, dimension (N)
The generated random numbers.
FFFFUUUURRRRTTTTHHHHEEEERRRR DDDDEEEETTTTAAAAIIIILLLLSSSS
This routine calls the auxiliary routine DLARUV to generate random real
numbers from a uniform (0,1) distribution, in batches of up to 128 using
vectorisable code. The Box-Muller method is used to transform numbers
from a uniform to a normal distribution.
PPPPaaaaggggeeee 1111