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Top Forums UNIX for Dummies Questions & Answers Random numbers without repetition Post 77934 by r2007 on Thursday 14th of July 2005 01:20:26 AM
Old 07-14-2005
Quote:
Originally Posted by asal_email
I actually want to use those random number on the fly such :
#! /bin/bash
while (condition)
do
number=$RANDOM
do some work here using random number until condition satisfied
done

the condition is independent of generated random number
but random numbers have to be generated as along as condition is met and
all numbers generated have to be unique.

Thanks again
well, the bash variable "$RANROM" is a random integer between 0 and 32767. if the condition is independent of generated random number, try to imagine the loop block has already run 32768 cycles, all of numbers used up. Smilie
so the condition must consider the random numbers rang.
 

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clarnv.f(3)							      LAPACK							       clarnv.f(3)

NAME
clarnv.f - SYNOPSIS
Functions/Subroutines subroutine clarnv (IDIST, ISEED, N, X) CLARNV returns a vector of random numbers from a uniform or normal distribution. Function/Subroutine Documentation subroutine clarnv (integerIDIST, integer, dimension( 4 )ISEED, integerN, complex, dimension( * )X) CLARNV returns a vector of random numbers from a uniform or normal distribution. Purpose: CLARNV returns a vector of n random complex numbers from a uniform or normal distribution. Parameters: IDIST IDIST is 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 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. X X is COMPLEX 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 calls the auxiliary routine SLARUV 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. Definition at line 100 of file clarnv.f. Author Generated automatically by Doxygen for LAPACK from the source code. Version 3.4.2 Tue Sep 25 2012 clarnv.f(3)
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