List of mostSimilarUsers() Examples

Examples of mostSimilarUsers()

org.apache.mahout.cf.taste.recommender.UserBasedRecommender.mostSimilarUsers()
@param userID ID of {@link User} for which to find most similar other {@link User}s @param howMany desired number of most similar {@link User}s to find @return {@link User}s most similar to the given user @throws TasteException if an error occurs while accessing the {@link org.apache.mahout.cf.taste.model.DataModel}

Examples of org.apache.mahout.cf.taste.recommender.UserBasedRecommender.mostSimilarUsers()

    assertEquals(0.3, firstRecommended.getValue(), EPSILON);
  }


  public void testMostSimilar() throws Exception {
    UserBasedRecommender recommender = buildRecommender();
    List<User> similar = recommender.mostSimilarUsers("test1", 2);
    assertNotNull(similar);
    assertEquals(2, similar.size());
    User first = similar.get(0);
    User second = similar.get(1);
    assertEquals("test2", first.getID());

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Examples of org.apache.mahout.cf.taste.recommender.UserBasedRecommender.mostSimilarUsers()

    users.add(getUser("test4"));
    DataModel dataModel = new GenericDataModel(users);
    UserSimilarity similarity = new PearsonCorrelationSimilarity(dataModel);
    UserNeighborhood neighborhood = new NearestNUserNeighborhood(3, similarity, dataModel);
    UserBasedRecommender recommender = new GenericUserBasedRecommender(dataModel, neighborhood, similarity);
    Collection<User> mostSimilar = recommender.mostSimilarUsers("test4", 3);
    assertNotNull(mostSimilar);
    assertEquals(0, mostSimilar.size());
  }


  private static UserBasedRecommender buildRecommender() throws Exception {

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