How to read multiple text file filled with columns calculating statistics perl -


i'm running network measurements ton of timestamps according picture: http://i.stack.imgur.com/tnnbf.png

i want statistics of mean, var & cov , problem have don't know how read in text files right values in right array.

i saw bash considered poor in area decided perl should better. attempt far:

#!/usr/bin/perl  #foreach $line  $pkt_number  = $1; $pkt_arrival = $2; $pkt_size    = $6;  $nr_of_pkg                = 16; $linespeed                = 100000; $sum_of_throughput        = 0; $throughput               = 0; $sum_of_throughputsquared = 0; $mean                     = 0; $var                      = 0; $co_v                     = 0;  $duration = $pkt_arrival[0] - $pkt_arrival[15];  (my $i = 0 ; $nr_of_pkg > $pkt_number[i] ; $i++) {   $throughput[i]             = $packet_size[i] / $pkt_arrival[i];   $sum_of_throughput         = $sum_of_throughput + $throughput[i];   $sum_of_throughput_squared = $sum_of_throughput_squared + $throughput[i] * $throughput[i]; }  $mean = $sum_of_throughput / $nr_of_pkg; $var  = (($sum_of_throughput * $sum_of_throughput) - $sum_of_throughput_squared); $co_v = sqrt($var)

this code read , parse text file.

my @pkt_number; @pkt_arrival; @pkt_size;  $i = 0; $line; while ( <> ) {      $line = " $_"; # make sure start whitespace     chomp $line;     ( $pkt_number[$i], $pkt_arrival[$i], $pkt_size[$i] )         = (split( /\s+/, $line, 8 ))[ 1, 2, 6 ];     printf "[%s]\n", join("/", $pkt_number[$i], $pkt_arrival[$i], $pkt_size[$i]);     $i++; }

and how run on linux :

% cat result.txt | ./your_perl.pl

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