List of iterateNonZero() Examples

Examples of iterateNonZero()

de.jungblut.math.DoubleVector.iterateNonZero()
org.apache.mahout.math.DenseVector.iterateNonZero()
Returns an iterator that traverses this Vector from 0 to cardinality-1, in that order. @see Iterable#iterator
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)
org.apache.mahout.math.SequentialAccessSparseVector.iterateNonZero()
org.apache.mahout.math.Vector.iterateNonZero()
Iterates over all non-zero elements.
NOTE: Implementations may choose to reuse the Element returned for performance reasons, so if you need a copy of it, you should call {@link #getElement} for the given index @return An {@link Iterator} over all non-zero elements
org.apache.mahout.matrix.Vector.iterateNonZero()
Iterates over all non-zero elements.
NOTE: Implementations may choose to reuse the Element returned for performance reasons, so if you need a copy of it, you should call {@link #getElement} for the given index @return An {@link java.util.Iterator} over all non-zero elements

Examples of de.jungblut.math.DoubleVector.iterateNonZero()

      DoubleVector feature = tuple.getFirst();
      DoubleVector outcome = tuple.getSecond();
      Iterator<DoubleVectorElement> featureIterator = feature.iterateNonZero();
      while (featureIterator.hasNext()) {
        DoubleVectorElement feat = featureIterator.next();
        Iterator<DoubleVectorElement> outcomeIterator = outcome
            .iterateNonZero();
        while (outcomeIterator.hasNext()) {
          DoubleVectorElement out = outcomeIterator.next();
          theta.set(feat.getIndex(), out.getIndex(), random.nextDouble());
        }

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

  public void testAddToVector() {
    FeatureVectorEncoder enc = new StaticWordValueEncoder("word");
    Vector v = new DenseVector(200);
    enc.addToVector("word1", v);
    enc.addToVector("word2", v);
    Iterator<Vector.Element> i = v.iterateNonZero();
    Iterator<Integer> j = ImmutableList.of(7, 118, 119, 199).iterator();
    while (i.hasNext()) {
      Vector.Element element = i.next();
      assertEquals(j.next().intValue(), element.index());
      assertEquals(1, element.get(), 0);

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

    enc.setDictionary(ImmutableMap.<String, Double>of("word1", 3.0, "word2", 1.5));
    Vector v = new DenseVector(200);
    enc.addToVector("word1", v);
    enc.addToVector("word2", v);
    enc.addToVector("word3", v);
    Iterator<Vector.Element> i = v.iterateNonZero();
    Iterator<Integer> j = ImmutableList.of(7, 101, 118, 119, 152, 199).iterator();
    Iterator<Double> k = ImmutableList.of(3.0, 0.75, 1.5, 1.5, 0.75, 3.0).iterator();
    while (i.hasNext()) {
      Vector.Element element = i.next();
      assertEquals(j.next().intValue(), element.index());

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

    Iterator<Double> k = ImmutableList.of(3.0, 0.75, 1.5, 1.5, 0.75, 3.0).iterator();
    while (i.hasNext()) {
      Vector.Element element = i.next();
      assertEquals(j.next().intValue(), element.index());
    }
    i = v.iterateNonZero();
    while (i.hasNext()) {
      Vector.Element element = i.next();
      assertEquals(String.format("checking v[%d]", element.index()), k.next(), element.get(), 0);
    }
    assertFalse(j.hasNext());

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

    Vector v = new DenseVector(200);
    enc.addToVector("word1", v);  // weight is log(2/1.5)
    enc.addToVector("word2", v);  // weight is log(3.5 / 1.5)
    enc.addToVector("word1", v);  // weight is log(4.5 / 2.5) (but overlays on first value)
    enc.addToVector("word3", v);  // weight is log(6 / 1.5)
    Iterator<Vector.Element> i = v.iterateNonZero();
    Iterator<Integer> j = ImmutableList.of(7, 101, 118, 119, 152, 199).iterator();
    Iterator<Double> k = ImmutableList.of(Math.log(2 / 1.5) + Math.log(4.5 / 2.5),
                                          Math.log(6 / 1.5), Math.log(3.5 / 1.5),
                                          Math.log(3.5 / 1.5), Math.log(6 / 1.5),
                                          Math.log(2 / 1.5) + Math.log(4.5 / 2.5)).iterator();

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

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

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

    }


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

    @Override
    protected void map(IntWritable userOrItemID, VectorWritable ratingsWritable, Context ctx)
        throws IOException, InterruptedException {
      Vector ratings = new SequentialAccessSparseVector(ratingsWritable.get());
      List<Vector> featureVectors = Lists.newArrayList();
      Iterator<Vector.Element> interactions = ratings.iterateNonZero();
      while (interactions.hasNext()) {
        int index = interactions.next().index();
        featureVectors.add(UorM.get(index));
      }

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

    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();
      float value = (float) element.get();

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