Welcome to Perl and to programming!.

To solve this problem Hash comes to mind. The code below open a new file to be read into i.e "freq_file.txt", and a file to read from. Print in the new file the values matched and it's frequency. See below: 

#!/usr/bin/perl
use warnings;
use strict;

print "Enter the name of your file, ie myfile.txt: ",;
chomp( my $file = <STDIN> );
my %found;

open my $fh,  '>', 'freq_file.txt' or die "can't open this file: $!";
open my $fh2, '<', $file           or die "can't open this file: $!";
while ( my $line = <$fh2> ) {
    $found{$_}++ foreach split /\s+?/, $line;
}
print $fh "Frequence\tValue Found", $/;
print $fh $_, "\t\t", $found{$_}, $/ foreach sort keys %found;

close $fh2 or die "can't close file: $!";
close $fh  or die "can't close file: $!";

[download]

I hope this helps

In reply to Re: Counting frequency of strings in files by 2teez
in thread Counting frequency of strings in files by Cian

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.