Hi oryan,

a number of people will tell you that this site is not a free code-writing service and that you should show some efforts at doing things yourself, and I agree.

Having said that, even if you did not show any Perl code, I appreciate that you have shown code in another scripting language. I consider this as a real effort. And, although I do not have any benchmark, I am fairly sure that a Perl program will be much much faster than a DOS batch script (well, you don't say it, but I guess your script is DOS batch).

So, you should really look at the links that were provided to you, but I am willing to help and I can give you the skeleton of a Perl program for what you want (quick draft, untested): 

use strict;
use warnings;

my $input = "input.txt";
open my $IN, "<", $input or die "cannot open $input $!";
my $output = "output.txt";
open my $OUT, ">", $output or die "cannot open $output $!";
while (my $line = <$IN>) {
    chomp $line; # remove newline character from end of line
    if ($line =~ /INTERPOLATED HYDROGRAPH AT (\w+)$/){
        print $OUT $1;
        next for 1..5; # skip 5 lines
        my $val2 = (split / /, $line)[1]; get the second column
        print $OUT $val2; # a separator may be needed here
        next; # skip one line
        my $val3 = (split / /, $line)[-1]; # get the last column
        print $OUT "$val3\n"; # a separator may be needed here
    }
}

[download]
This is very rough and untested, but I hope it will get you going.

Update: There are two errors in the code above (thanks to poj for pointing them out. Please see below (Re^3: Perl solution for current batch file to extract specific column text) a corrected version.

In reply to Re: Perl solution for current batch file to extract specific column text by Laurent_R
in thread Perl solution for current batch file to extract specific column text by oryan

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