Package org.apache.mahout.cf.taste.recommender

Examples of org.apache.mahout.cf.taste.recommender.IDRescorer

24
25
26
27
28
29
30
31
32
33
34
35
/** <p>Tests {@link NullRescorer}.</p> */
public final class NullRescorerTest extends TasteTestCase {

  @Test
  public void testItemRescorer() throws Exception {
    IDRescorer rescorer = NullRescorer.getItemInstance();
    assertNotNull(rescorer);
    assertEquals(1.0, rescorer.rescore(1L, 1.0), EPSILON);
    assertEquals(1.0, rescorer.rescore(0L, 1.0), EPSILON);
    assertEquals(0.0, rescorer.rescore(1L, 0.0), EPSILON);
    assertTrue(Double.isNaN(rescorer.rescore(1L, Double.NaN)));
  }
View Full Code Here
34
35
36
37
38
39
40
41
42
43
44
45
    assertTrue(Double.isNaN(rescorer.rescore(1L, Double.NaN)));
  }

  @Test
  public void testUserRescorer() throws Exception {
    IDRescorer rescorer = NullRescorer.getUserInstance();
    assertNotNull(rescorer);
    assertEquals(1.0, rescorer.rescore(1L, 1.0), EPSILON);
    assertEquals(1.0, rescorer.rescore(0L, 1.0), EPSILON);
    assertEquals(0.0, rescorer.rescore(1L, 0.0), EPSILON);
    assertTrue(Double.isNaN(rescorer.rescore(1L, Double.NaN)));
  }
View Full Code Here
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
  @Test
  public void testMultiRecommendRescorer() {
    RescorerProvider multi =
        new MultiRescorerProvider(new SimpleModRescorerProvider(2), new SimpleModRescorerProvider(3));
   
    IDRescorer provider = multi.getRecommendRescorer(new long[]{5}, (MyrrixRecommender) null);
    assertNull(provider);
   
    provider = multi.getRecommendRescorer(new long[]{2}, (MyrrixRecommender) null);
    assertNotNull(provider);
    assertFalse(provider instanceof MultiRescorer);
    assertTrue(provider.isFiltered(3));
    assertFalse(provider.isFiltered(2));

    provider = multi.getRecommendRescorer(new long[]{6}, (MyrrixRecommender) null);
    assertNotNull(provider);
    assertTrue(provider instanceof MultiRescorer);
    assertTrue(provider.isFiltered(3));
    assertTrue(provider.isFiltered(2));
    assertFalse(provider.isFiltered(12));
  }
View Full Code Here
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
  @Test
  public void testMultiRecommendToAnonymousRescorer() {
    RescorerProvider multi =
        new MultiRescorerProvider(new SimpleModRescorerProvider(2), new SimpleModRescorerProvider(3));
   
    IDRescorer provider = multi.getRecommendToAnonymousRescorer(new long[]{5}, (MyrrixRecommender) null);
    assertNull(provider);
   
    provider = multi.getRecommendToAnonymousRescorer(new long[]{2}, (MyrrixRecommender) null);
    assertNotNull(provider);
    assertFalse(provider instanceof MultiRescorer);
    assertTrue(provider.isFiltered(3));
    assertFalse(provider.isFiltered(2));

    provider = multi.getRecommendToAnonymousRescorer(new long[]{6}, (MyrrixRecommender) null);
    assertNotNull(provider);
    assertTrue(provider instanceof MultiRescorer);
    assertTrue(provider.isFiltered(3));
    assertTrue(provider.isFiltered(2));
    assertFalse(provider.isFiltered(12));
  }
View Full Code Here
73
74
75
76
77
78
79
80
81
82
83
84
 
  @Test
  public void testMultiMostPopularItemsRescorer() {
    RescorerProvider multi =
        new MultiRescorerProvider(new SimpleModRescorerProvider(2), new SimpleModRescorerProvider(3));
    IDRescorer provider = multi.getMostPopularItemsRescorer(null);
    assertNotNull(provider);
    assertTrue(provider instanceof MultiRescorer);
    assertTrue(provider.isFiltered(3));
    assertTrue(provider.isFiltered(2));
    assertFalse(provider.isFiltered(6));   
  }
View Full Code Here
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
          return null;
        }
      }
    }

    IDRescorer rescorer = this.rescorer;
    if (rescorer != null && rescorer.isFiltered(itemID)) {
      return null;
    }

    float[] itemFeatures = entry.getValue();
    double sum = 0.0;
    int count = 0;
    for (float[] oneUserFeatures : features) {
      sum += SimpleVectorMath.dot(itemFeatures, oneUserFeatures);
      count++;
    }
   
    if (rescorer != null) {
      sum = rescorer.rescore(itemID, sum);
      if (!LangUtils.isFinite(sum)) {
        return null;
      }
    }
View Full Code Here
54
55
56
57
58
59
60
61
62
63
64
 
  @Override
  public IDRescorer getRecommendRescorer(long[] userIDs, MyrrixRecommender recommender, String... args) {
    List<IDRescorer> rescorers = Lists.newArrayListWithCapacity(providers.length);
    for (RescorerProvider provider : providers) {
      IDRescorer rescorer = provider.getRecommendRescorer(userIDs, recommender, args);
      if (rescorer != null) {
        rescorers.add(rescorer);
      }
    }
    return buildRescorer(rescorers);
View Full Code Here
66
67
68
69
70
71
72
73
74
75
76
  @Override
  public IDRescorer getRecommendToAnonymousRescorer(long[] itemIDs, MyrrixRecommender recommender, String... args) {
    List<IDRescorer> rescorers = Lists.newArrayListWithCapacity(providers.length);
    for (RescorerProvider provider : providers) {
      IDRescorer rescorer = provider.getRecommendToAnonymousRescorer(itemIDs, recommender, args);
      if (rescorer != null) {
        rescorers.add(rescorer);
      }
    }
    return buildRescorer(rescorers); 
View Full Code Here
78
79
80
81
82
83
84
85
86
87
88
  @Override
  public IDRescorer getMostPopularItemsRescorer(MyrrixRecommender recommender, String... args) {
    List<IDRescorer> rescorers = Lists.newArrayListWithCapacity(providers.length);
    for (RescorerProvider provider : providers) {
      IDRescorer rescorer = provider.getMostPopularItemsRescorer(recommender, args);
      if (rescorer != null) {
        rescorers.add(rescorer);
      }
    }
    return buildRescorer(rescorers);
View Full Code Here
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
  @Override
  public RecommendedItem next() {
    FastByIDFloatMap.MapEntry entry = countsIterator.next();
    long id = entry.getKey();
    float value = entry.getValue();
    IDRescorer theRescorer = rescorer;
    if (theRescorer != null) {
      if (theRescorer.isFiltered(id)) {
        return null;
      }
      value = (float) theRescorer.rescore(id, value);
      if (!LangUtils.isFinite(value)) {
        return null;
      }
    }
    delegate.set(id, value);
View Full Code Here
TOP

Related Classes of org.apache.mahout.cf.taste.recommender.IDRescorer

  • mia.recommender.ch05.LibimsetiRecommender
  • net.myrrix.online.eval.AbstractEvaluator
  • net.myrrix.online.eval.PrecisionRecallEvaluator
  • net.myrrix.online.example.rescorer.FilterHalfRescorerProvider
  • net.myrrix.online.MostPopularItemsIterator
  • net.myrrix.online.MultiRescorerProvider
  • net.myrrix.online.MultiRescorerProviderTest
  • net.myrrix.online.RecommendIterator
  • net.myrrix.web.AllRecommendations
  • net.myrrix.web.servlets.MostPopularItemsServlet
    • Copyright © 2018 www.massapicom. All rights reserved.
    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.