Read Data from text file and write to text file

[murari208@gmail.com]

hi all,
there is a text file containing some data like number of samples , time ,x0...
i need to read only times of the sample and write it in a text file since i am taking large number of samples .can you please help me in solving this.

 

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How about the following short perl program.

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Code Perl - [expand]
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#!/usr/local/bin/perl
use 5.012;
use warnings;
use strict;
 
# extract time in a file with the following format:
# number_of_samples, time, x0, x1, ....
# Expects that the data is comma+1space separated, change the split line if you have a different separator.
my $filename = $ARGV[0];
open (my $read_fh, '<', $filename);
 
while (my $line = <$read_fh>) {
  my @data = split /, /, $line; # split on comma+1space
  if (length $data[1]) {print "$data[1]\n"}
}
 
close ($read_fh);

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If you want the output in another file just redirect the output on the command line to another file.