How to insert random numbers into each line? Post: 302973939

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Top Forums Shell Programming and Scripting How to insert random numbers into each line? Post 302973939 by rovf on Tuesday 24th of May 2016 07:19:13 AM

05-24-2016

Registered User

Quote:

Originally Posted by Don Cragun

Hi roof,
Why don't you think 000 and 029 just as valid as 3-digit random numbers as 100 and 999?

I didn't say it isn't, but it might be. Some people consider a 3-digit number as one which is higher than 99 (and might be disappointed, if they get promised an hourly payment in the "range of a 3-digit-number" and end up getting payed US$ 002 per hour), and others are happy with a leading zero. The OP didn't say anything, and I gave my implementation as an example.

Quote:

Originally Posted by Don Cragun

And, since the input is "thousands of lines", it isn't obvious whether or not my awk suggestion would be slower or faster processing the desired file than the zsh (or ksh93 or bash) script you suggested.

To be honest, even for a couple of thousands of lines, speed difference should only matter if the same type of transformation is done many times in a loop. I gave zsh as an example, because I personally use either zsh or Ruby for this type of task (out of a habit), but bash, Perl, Python, awk etc. work of course equally well, and the OP did not have expressed a preference for a particular language.

rovf

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slarnv

slarnv.f(3)							      LAPACK							       slarnv.f(3)

NAME

       slarnv.f -

SYNOPSIS

   Functions/Subroutines
       subroutine slarnv (IDIST, ISEED, N, X)
	   SLARNV

Function/Subroutine Documentation
   subroutine slarnv (integerIDIST, integer, dimension( 4 )ISEED, integerN, real, dimension( * )X)
       SLARNV

       Purpose:

	    SLARNV 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 REAL array, dimension (N)
		     The generated random numbers.

       Author:
	   Univ. of Tennessee

	   Univ. of California Berkeley

	   Univ. of Colorado Denver

	   NAG Ltd.

       Date:
	   November 2011

       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 98 of file slarnv.f.

Author
       Generated automatically by Doxygen for LAPACK from the source code.

Version 3.4.1							  Sun May 26 2013						       slarnv.f(3)