Examples of org.apache.mahout.math.RandomAccessSparseVector.iterateNonZero()

Class org.apache.mahout.math.RandomAccessSparseVector

Examples of org.apache.mahout.math.RandomAccessSparseVector.iterateNonZero()

org.apache.mahout.math.RandomAccessSparseVector.iterateNonZero()
NOTE: this implementation reuses the Vector.Element instance for each call of next(). If you need to preserve the instance, you need to make a copy of it @return an {@link NonZeroIterator} over the Elements. @see #getElement(int)

    }
    
    Queue<RecommendedItem> topItems = new PriorityQueue<RecommendedItem>(recommendationsPerUser + 1,
        Collections.reverseOrder());
    
    Iterator<Vector.Element> recommendationVectorIterator = recommendationVector.iterateNonZero();
    LongWritable itemID = new LongWritable();
    while (recommendationVectorIterator.hasNext()) {
      Vector.Element element = recommendationVectorIterator.next();
      int index = element.index();
      if (userVector.get(index) == 0.0) {

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      RandomAccessSparseVector cooccurrenceRow = new RandomAccessSparseVector(Integer.MAX_VALUE, 1000);
      while (index2s.hasNext()) {
        int index2 = index2s.next().get();
        cooccurrenceRow.set(index2, cooccurrenceRow.get(index2) + 1.0);
      }
      Iterator<Vector.Element> cooccurrences = cooccurrenceRow.iterateNonZero();
      while (cooccurrences.hasNext()) {
        Vector.Element element = cooccurrences.next();
        if (element.get() <= 1.0) { // purge small values
          element.set(0.0);
        }

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    }


    Queue<RecommendedItem> topItems = new PriorityQueue<RecommendedItem>(recommendationsPerUser + 1,
    Collections.reverseOrder(ByValueRecommendedItemComparator.getInstance()));


    Iterator<Vector.Element> recommendationVectorIterator = recommendationVector.iterateNonZero();
    while (recommendationVectorIterator.hasNext()) {
      Vector.Element element = recommendationVectorIterator.next();
      int index = element.index();


      long itemID = indexItemIDMap.get(index);

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