Hi, i got problems in finding the term weight. It something about similiarty. I can solve the problem of similarity now. however, i do not know how to solve and find term weight. My question is i need to use 5 files and then find the term weight of each word in each document. However, my program must need to fliter words through the stoplist and calculate the term weight on stems (as determined by Lingua::Stem::En) instead on words.
However, i fail to find the most frequency word in the file. and then i am stuck.. can anyone help?? thanks 
#! /usr/local/bin/perl -w
use strict;
use lib qw(.);
use Lingua::Stem::En;

my $stopfile = 'stopwords';
my $base= shift @ARGV;


open STOP, "<$stopfile"; 
chomp( my @stop= <STOP> );
close STOP;

my %stopwords=();
 add the empty string '' to the stopwords as well
@stopwords{@stop,''} = ();

 read in basefile
my %D1=();
my $result='';
my $top=0;
open BASETEXT, "<$base";
while ( <BASETEXT> ) {
   @D1{ map { my $l = lc; exists $stopwords{$l}?():$l } split /\W+/ } 
+= ();
}


my %D2=();

while ( <> ) {
   my %frequency=();
   my @D2 =  map { my $l = lc; exists $stopwords{$l}?():$l } split /\W
++/ ; #= ();
   %D2 = @D2;
 foreach my $word ( @D2 ) {
    $frequency{$word} = 0 ;
    }

   foreach my $word ( @D2 ) {
    $frequency{$word} = $frequency{$word} + 1 ;
    }

foreach my $word (keys %frequency) {
if ( $frequency {$word} > $top) {
         $result = $word;
         $top= $frequency {$word};
                                                                  }
                                   }
   
    print "file $ARGV testing: $result\n";
    print "number of times: $top\n";
    foreach my $word (@D2) {
    print "$word\n";
   }
}
continue {
   if (eof) {

      my $total = (scalar keys %D1) + (scalar keys %D1);
     my $total = scalar keys %D2;
      my $intersect = 0;

      foreach my $key (keys %D1) {
         $intersect++ if exists $D2{$key};
      }
     my $similarity = 2*$intersect/$total;
      print "Similarity between $base and $ARGV = $similarity\n";
      #print "\t@{[keys %D2]}\n";
      #print "\t@{[keys %D1]}\n";
      %D2 = ();
     $similarity = 0;
   }
}

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Edited 2003-03-05 by mirod: added <code> tags

In reply to Term weight by Anonymous Monk

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