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Top Forums Shell Programming and Scripting How to select lines randomly without replacement in UNIX? Post 302981466 by Corona688 on Tuesday 13th of September 2016 12:50:12 PM
Old 09-13-2016
The linux shuf utility can select random lines without repeats. Run it once and read three lines at a time from it in a loop.

Code:
shuf < inputfile | while read LINE1 && read LINE2 && read LINE3
do
...
done

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PGASetIntegerInitRange(2)					      PGAPack						 PGASetIntegerInitRange(2)

NAME
PGASetIntegerInitRange - sets a flag to tell the initialization routines to set each integer-valued gene to a value chosen randomly from the interval given by an upper and lower bound. DESCRIPTION
No string initialization is done by this call. INPUT PARAMETERS
ctx - context variable min - array of lower bounds that define the interval the gene is initialized from max - array of upper bounds that define the interval the gene is initialized from OUTPUT PARAMETERS
none SYNOPSIS
#include "pgapack.h" void PGASetIntegerInitRange(ctx, min, max) PGAContext *ctx int *min int *max LOCATION
integer.c EXAMPLE
Set the initialization routines to select a value for gene i uniformly randomly from the interval [0,i]. Assumes all strings are of the same length. PGAContext *ctx; int *low, *high, stringlen, i; : stringlen = PGAGetStringLength(ctx); low = (int *) malloc(stringlen*sizeof(int)); high = (int *) malloc(stringlen*sizeof(int)); for(i=0;i<stringlen;i++) { low[i] = 0; high[i] = i } PGASetIntegerInitRange(ctx, low, high); 05/01/95 PGASetIntegerInitRange(2)
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