List of tf() Examples

Examples of tf()

org.apache.lucene.search.DefaultSimilarity.tf()
Implemented as sqrt(freq).
org.apache.lucene.search.Similarity.tf()
Computes a score factor based on a term or phrase's frequency in a document. This value is multiplied by the {@link #idf(int,int)}factor for each term in the query and these products are then summed to form the initial score for a document.
Terms and phrases repeated in a document indicate the topic of the document, so implementations of this method usually return larger values when freq is large, and smaller values when freq is small.
The default implementation calls {@link #tf(float)}. @param freq the frequency of a term within a document @return a score factor based on a term's within-document frequency
org.apache.lucene.search.similarities.DefaultSimilarity.tf()
Implemented as sqrt(freq).
org.apache.lucene.search.similarities.TFIDFSimilarity.tf()
Computes a score factor based on a term or phrase's frequency in a document. This value is multiplied by the {@link #idf(long,long)}factor for each term in the query and these products are then summed to form the initial score for a document.
Terms and phrases repeated in a document indicate the topic of the document, so implementations of this method usually return larger values when freq is large, and smaller values when freq is small.
The default implementation calls {@link #tf(float)}. @param freq the frequency of a term within a document @return a score factor based on a term's within-document frequency
org.elasticsearch.search.lookup.IndexFieldTerm.tf()

Examples of org.apache.lucene.search.Similarity.tf()


    ss.setBaselineTfFactors(0.0f, 0.0f);
  
    for (int i = 1; i < 1000; i++) {
      assertEquals("tf: i="+i,
                   d.tf(i), s.tf(i), 0.0f);
    }


    // tf higher
  
    ss.setBaselineTfFactors(1.0f, 0.0f);

View Full Code Here

Examples of org.apache.lucene.search.Similarity.tf()

  
    ss.setBaselineTfFactors(1.0f, 0.0f);
  
    for (int i = 1; i < 1000; i++) {
      assertTrue("tf: i="+i+" : d="+d.tf(i)+
                 " < s="+s.tf(i),
                 d.tf(i) < s.tf(i));
    }


    // tf flat

View Full Code Here

Examples of org.apache.lucene.search.Similarity.tf()

    ss.setBaselineTfFactors(1.0f, 0.0f);
  
    for (int i = 1; i < 1000; i++) {
      assertTrue("tf: i="+i+" : d="+d.tf(i)+
                 " < s="+s.tf(i),
                 d.tf(i) < s.tf(i));
    }


    // tf flat
  
    ss.setBaselineTfFactors(1.0f, 6.0f);

View Full Code Here

Examples of org.apache.lucene.search.Similarity.tf()


    // tf flat
  
    ss.setBaselineTfFactors(1.0f, 6.0f);
    for (int i = 1; i <=6; i++) {
      assertEquals("tf flat1: i="+i, 1.0f, s.tf(i), 0.0f);
    }
    ss.setBaselineTfFactors(2.0f, 6.0f);
    for (int i = 1; i <=6; i++) {
      assertEquals("tf flat2: i="+i, 2.0f, s.tf(i), 0.0f);
    }

View Full Code Here

Examples of org.apache.lucene.search.Similarity.tf()

    for (int i = 1; i <=6; i++) {
      assertEquals("tf flat1: i="+i, 1.0f, s.tf(i), 0.0f);
    }
    ss.setBaselineTfFactors(2.0f, 6.0f);
    for (int i = 1; i <=6; i++) {
      assertEquals("tf flat2: i="+i, 2.0f, s.tf(i), 0.0f);
    }
    for (int i = 6; i <=1000; i++) {
      assertTrue("tf: i="+i+" : s="+s.tf(i)+
                 " < d="+d.tf(i),
                 s.tf(i) < d.tf(i));

View Full Code Here

Examples of org.apache.lucene.search.Similarity.tf()

    ss.setBaselineTfFactors(2.0f, 6.0f);
    for (int i = 1; i <=6; i++) {
      assertEquals("tf flat2: i="+i, 2.0f, s.tf(i), 0.0f);
    }
    for (int i = 6; i <=1000; i++) {
      assertTrue("tf: i="+i+" : s="+s.tf(i)+
                 " < d="+d.tf(i),
                 s.tf(i) < d.tf(i));
    }


    // stupidity

View Full Code Here

Examples of org.apache.lucene.search.Similarity.tf()

      assertEquals("tf flat2: i="+i, 2.0f, s.tf(i), 0.0f);
    }
    for (int i = 6; i <=1000; i++) {
      assertTrue("tf: i="+i+" : s="+s.tf(i)+
                 " < d="+d.tf(i),
                 s.tf(i) < d.tf(i));
    }


    // stupidity
    assertEquals("tf zero", 0.0f, s.tf(0), 0.0f);
  }

View Full Code Here

Examples of org.apache.lucene.search.Similarity.tf()

                 " < d="+d.tf(i),
                 s.tf(i) < d.tf(i));
    }


    // stupidity
    assertEquals("tf zero", 0.0f, s.tf(0), 0.0f);
  }


  public void testHyperbolicSweetSpot() {
  
    SweetSpotSimilarity ss = new SweetSpotSimilarity() {

View Full Code Here

Examples of org.apache.lucene.search.Similarity.tf()

    ss.setHyperbolicTfFactors(3.3f, 7.7f, Math.E, 5.0f);
    
    Similarity s = ss;


    for (int i = 1; i <=1000; i++) {
      assertTrue("MIN tf: i="+i+" : s="+s.tf(i),
                 3.3f <= s.tf(i));
      assertTrue("MAX tf: i="+i+" : s="+s.tf(i),
                 s.tf(i) <= 7.7f);
    }
    assertEquals("MID tf", 3.3f+(7.7f - 3.3f)/2.0f, s.tf(5), 0.00001f);

View Full Code Here

Examples of org.apache.lucene.search.Similarity.tf()

    
    Similarity s = ss;


    for (int i = 1; i <=1000; i++) {
      assertTrue("MIN tf: i="+i+" : s="+s.tf(i),
                 3.3f <= s.tf(i));
      assertTrue("MAX tf: i="+i+" : s="+s.tf(i),
                 s.tf(i) <= 7.7f);
    }
    assertEquals("MID tf", 3.3f+(7.7f - 3.3f)/2.0f, s.tf(5), 0.00001f);

View Full Code Here

0 1 2 3 4 5

TOP

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.