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Top Forums UNIX for Advanced & Expert Users UNIX script for making random numbers without repetition Post 302849665 by Chubler_XL on Monday 2nd of September 2013 09:58:21 PM
Old 09-02-2013
Here is a solution using awk.

You didn't say column separator your file has - so I'm assuming it's a comma.

You can change the -F parameter according to you actual value, also note that some POSIX awk implementations may fall over if you number of columns is too large:

Code:
awk -F',' '{ srand();
  for(i=1;i<=1440;) {
        v=$(int(1+rand()*7200))
        if (!(v in N)) {
           N[v]
           printf "%s%s", v, (i++<1440?FS:RS)
        }
  }
}' random.csv

This User Gave Thanks to Chubler_XL For This Post:
 

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dlarnv.f(3)							      LAPACK							       dlarnv.f(3)

NAME
dlarnv.f - SYNOPSIS
Functions/Subroutines subroutine dlarnv (IDIST, ISEED, N, X) DLARNV returns a vector of random numbers from a uniform or normal distribution. Function/Subroutine Documentation subroutine dlarnv (integerIDIST, integer, dimension( 4 )ISEED, integerN, double precision, dimension( * )X) DLARNV returns a vector of random numbers from a uniform or normal distribution. Purpose: DLARNV returns a vector of n random real numbers from a uniform or normal distribution. Parameters: IDIST IDIST is INTEGER Specifies the distribution of the random numbers: = 1: uniform (0,1) = 2: uniform (-1,1) = 3: normal (0,1) 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 DOUBLE PRECISION 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 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. Definition at line 98 of file dlarnv.f. Author Generated automatically by Doxygen for LAPACK from the source code. Version 3.4.2 Tue Sep 25 2012 dlarnv.f(3)
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