1esl-selectn(1)                   Easel Manual                   esl-selectn(1)
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NAME

6       esl-selectn - select random subset of lines from file
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SYNOPSIS

10       esl-selectn [options] nlines filename
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DESCRIPTION

15       esl-selectn  selects nlines lines at random from file filename and out‐
16       puts them on stdout.
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19       If filename is - (a single dash), input is read from stdin.
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23       Uses an efficient reservoir sampling algorithm that only requires  only
24       a  single  pass  through  filename,  and memory storage proportional to
25       nlines (and importantly, not to the size of the file filename  itself).
26       esl-selectn  can  therefore  be  used to create large scale statistical
27       sampling  experiments,  especially  in  combination  with  other  Easel
28       miniapplications.
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OPTIONS

33       -h     Print brief help; includes version number and summary of all op‐
34              tions, including expert options.
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38       --seed <d>
39              Set the random number seed to <d>, an integer >= 0.  The default
40              is  0,  which means to use a randomly selected seed.  A seed > 0
41              results in reproducible identical samples from different runs of
42              the same command.
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SEE ALSO

47       http://bioeasel.org/
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51       Copyright (C) 2020 Howard Hughes Medical Institute.
52       Freely distributed under the BSD open source license.
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AUTHOR

56       http://eddylab.org
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60Easel 0.48                         Nov 2020                     esl-selectn(1)
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