TypeTokenRatioComparator ----Stylistic Similarity (Package dkpro.similarity.algorithms.style)

[Farjana Khan]

I got Similarity Score like this: NaN

My Code:

 String text1= "i am going to school";
 String  text2= "i am going";

        JCas JCas1 =JCasFactory.createJCas();
        JCas1.setDocumentLanguage("en");
        JCas1.setDocumentText(text1);
       
        JCas JCas2 = JCasFactory.createJCas();
        JCas2.setDocumentLanguage("en");
        JCas2.setDocumentText(text2);
                   
         Annotation a1 = new Annotation(JCas1);
         a1.setBegin(0);
         a1.setEnd(text1.length());
         Annotation a2 = new Annotation(JCas2);
         a2.setBegin(0);
         a2.setEnd(text2.length());

TypeTokenRatioComparator comparator=new TypeTokenRatioComparator();   
       
       
        double result = 0.0;
       
        try {
           
            result =comparator.getSimilarity( JCas1,JCas2,a1,a2);          
           
           
        } catch (SimilarityException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
       
        system.out.print(result);
    }
Here is take TypeTokenRatioComparator class.Could you give me some info what is the actual ?
actually i  want get similarity by using this class. still now i have not clear info how to call
TypeTokenRatioComparator.getSimilarity(JCas jcas1, JCas jcas2, Annotation coveringAnnotation1,  
          Annotation coveringAnnotation2)

Please help me.....

[Torsten Zesch]

This comparator requires Token and Lemma annotations. If you create them accordingly, instead of the untyped "Annotation"s this should work.

-Torsten

ps: requiring lemmas sounds like a bit too much actually. Maybe the implementation should be changed in this point. However, token annotations are definitely needed.

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