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06-10-2008
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Random lines selection form a file.
Quote:
Code:
>cat data.dat 0001 Robbert 0002 Nick 0003 Mark ……. 1000 Jarek Quote:
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06-10-2008
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Prepend a random number to each line, sort the file, take the first few lines, and remove the leading random number.
Code:
awk 'BEGIN {srand()} {printf "%05.0f %s \n",rand()*99999, $0; }' datafile | sort -n | head -100 | sed 's/^[0-9]* //'
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06-10-2008
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I afraid, if this is going to generate any duplicate random numbers in range from 1 to 100? If yes then how can you avoid that?
If this generates the duplicate numbers then the same record will be picked up more than once. Cheers, McLan
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06-10-2008
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Why don't you try it? The range of rand()*99999 is not 1-100, duplicate random numbers are possible, duplicate lines selected from your file are not possible.
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