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  #1  
9th June 2015, 09:11 AM
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TF IDF Java Implementation

Hello sir I am doing b.tech in computer science and I want to know that How To Calculate Tf-Idf and Cosine Similarity using JAVA. Will you please tell me ?
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  #2  
9th June 2015, 09:41 AM
Super Moderator
 
Join Date: Apr 2013
Re: TF IDF Java Implementation

Hey dear as per your request here I am providing you the detail hope it will be helpful for you

Solution :-
//TfIdf.java
package com.computergodzilla.tfidf;

import java.util.List;

/**
* Class to calculate TfIdf of term.
* @author Mubin Shrestha
*/
public class TfIdf {

/**
* Calculates the tf of term termToCheck
* @param totalterms : Array of all the words under processing document
* @param termToCheck : term of which tf is to be calculated.
* @return tf(term frequency) of term termToCheck
*/
public double tfCalculator(String[] totalterms, String termToCheck) {
double count = 0; //to count the overall occurrence of the term termToCheck
for (String s : totalterms) {
if (s.equalsIgnoreCase(termToCheck)) {
count++;
}
}
return count / totalterms.length;
}

/**
* Calculates idf of term termToCheck
* @param allTerms : all the terms of all the documents
* @param termToCheck
* @return idf(inverse document frequency) score
*/
public double idfCalculator(List allTerms, String termToCheck) {
double count = 0;
for (String[] ss : allTerms) {
for (String s : ss) {
if (s.equalsIgnoreCase(termToCheck)) {
count++;
break;
}
}
}
return 1 + Math.log(allTerms.size() / count);
}
}


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