I'm trying to count the number of pairs of words in a text file and have come unstuck on the best way of donig so. What I want to do is to capture word a and then the next word (a+1)(count it) and then do that for the next word (which was a+1) and build a count of each set of two word pairings for the entire file. I can split it into single words but not a group of two. 
#!perl

use strict;
use warnings;


my $file = "test.txt";

open (IN, $file) || die "$file not found\n";
my @bigram = <IN>;
close (IN);
chomp @bigram;

my %count;
my $word;
foreach my $sequence (@bigram) {
    my $count;
    my @word = split ' ', $sequence;
    foreach $word(@word) {
       $count{$word}++; 
    }

}

foreach $word (sort by_count keys %count) {
        print "$word occurs $count{$word} times\n";
}
                        
        
#orders the count
sub by_count {
        $count{$b} <=> $count{$a};
}

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In reply to Dividing a file into groups of two words and counting them by Anonymous Monk

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