Calculating TF

I have a question, I'm crating a script that will calculate the TF from a document. I have the document stored in a vector.

My question is when I print the vector I get the frequency of times the words appear in the text, for example the word college appears 10 times in the text. Should I keep the numbers like this or should I make the number between 0 and 1?

Because every where that I look they say that the TF is 0.1 or 0.9.

Here is the code I have to calculate the frequency.
#Get the word frequency from the text.
for my $word (@$words){

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Keeping the TF between 0 and 1 means it is normalized.  To do this, divide every number by the highest frequency.

Whether or not you do this will depend on how you are using it.
EnnioAuthor Commented:
So I should dived it to the highest frequency or the number of words in the text?

By the highest frequency.

For examle, if you had this:
    college: 10
    apple: 6
    letter: 16
You would divide each by 16, because it is the highest frequency, getting:
    college: .625
    apple: .375
    letter: 1.0

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EnnioAuthor Commented:
ok... thanks... because I was looking some where and they said to divide by the total numbers of terms in the text.  That make sense now.

Well, again it depends on what you are looking for, but you could divide each by the total number of terms in the text.
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