List of mostSimilarItems() Examples

Examples of mostSimilarItems()

net.myrrix.common.MyrrixRecommender.mostSimilarItems()
@param itemID ID of item for which to find most similar other items @param howMany desired number of most similar items to find @return items most similar to the given item, ordered from most similar to least @throws org.apache.mahout.cf.taste.common.NoSuchItemException if the item is not known
net.myrrix.online.ServerRecommender.mostSimilarItems()
One-argument version of {@link #mostSimilarItems(long[],int)}.
org.apache.mahout.cf.taste.recommender.ItemBasedRecommender.mostSimilarItems()
@param itemID ID of item for which to find most similar other items @param howMany desired number of most similar items to find @return items most similar to the given item, ordered from most similar to least @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.ItemBasedRecommender.mostSimilarItems()

  }


  @Test
  public void testMostSimilarToMultipleDontExcludeIfNotSimilarToAll() throws Exception {
    ItemBasedRecommender recommender = buildRecommender2();
    List<RecommendedItem> similar = recommender.mostSimilarItems(new long[] {1, 2, 4}, 10, false);
    assertNotNull(similar);
    assertEquals(2, similar.size());
    RecommendedItem first = similar.get(0);
    RecommendedItem second = similar.get(1);
    assertEquals(0, first.getItemID());

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Examples of org.apache.mahout.cf.taste.recommender.ItemBasedRecommender.mostSimilarItems()

  }


  @Test
  public void testMostSimilar() throws Exception {
    ItemBasedRecommender recommender = buildRecommender();
    List<RecommendedItem> similar = recommender.mostSimilarItems(0, 2);
    assertNotNull(similar);
    assertEquals(2, similar.size());
    RecommendedItem first = similar.get(0);
    RecommendedItem second = similar.get(1);
    assertEquals(1, first.getItemID());

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Examples of org.apache.mahout.cf.taste.recommender.ItemBasedRecommender.mostSimilarItems()

  }


  @Test
  public void testMostSimilarToMultiple() throws Exception {
    ItemBasedRecommender recommender = buildRecommender2();
    List<RecommendedItem> similar = recommender.mostSimilarItems(new long[] {0, 1}, 2);
    assertNotNull(similar);
    assertEquals(2, similar.size());
    RecommendedItem first = similar.get(0);
    RecommendedItem second = similar.get(1);
    assertEquals(2, first.getItemID());

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Examples of org.apache.mahout.cf.taste.recommender.ItemBasedRecommender.mostSimilarItems()

  }


  @Test
  public void testMostSimilarToMultipleExcludeIfNotSimilarToAll() throws Exception {
    ItemBasedRecommender recommender = buildRecommender2();
    List<RecommendedItem> similar = recommender.mostSimilarItems(new long[] {3, 4}, 2);
    assertNotNull(similar);
    assertEquals(1, similar.size());
    RecommendedItem first = similar.get(0);
    assertEquals(0, first.getItemID());
    assertEquals(0.2f, first.getValue(), EPSILON);

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Examples of org.apache.mahout.cf.taste.recommender.ItemBasedRecommender.mostSimilarItems()

  }


  @Test
  public void testMostSimilarToMultipleDontExcludeIfNotSimilarToAll() throws Exception {
    ItemBasedRecommender recommender = buildRecommender2();
    List<RecommendedItem> similar = recommender.mostSimilarItems(new long[] {1, 2, 4}, 10, false);
    assertNotNull(similar);
    assertEquals(2, similar.size());
    RecommendedItem first = similar.get(0);
    RecommendedItem second = similar.get(1);
    assertEquals(0, first.getItemID());

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