Package org.apache.mahout.math

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

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    FeatureVectorEncoder encoder = new StaticWordValueEncoder("text");
    for (String word : doc.elementSet()) {
      encoder.addToVector(word, w.weight(word, doc.count(word)), v);
    }
    if (normalize) {
      return v.assign(Functions.div(v.norm(2)));
    } else {
      return v;
    }
  }
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  public static List<Vector> getPoints(double[][] raw) {
    List<Vector> points = new ArrayList<Vector>();
    for (int i = 0; i < raw.length; i++) {
      double[] fr = raw[i];
      Vector vec = new RandomAccessSparseVector(fr.length);
      vec.assign(fr);
      points.add(vec);
    }
    return points;
  }
 
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  public static List<VectorWritable> getPointsWritable(double[][] raw) {
    List<VectorWritable> points = new ArrayList<VectorWritable>();
    int i = 0;
    for (double[] fr : raw) {
      Vector vec = new RandomAccessSparseVector(String.valueOf(i++), fr.length);
      vec.assign(fr);
      points.add(new VectorWritable(vec));
    }
    return points;
  }
 
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  private static List<VectorWritable> getPointsWritable(double[][] raw) {
    List<VectorWritable> points = new ArrayList<VectorWritable>();
    int i = 0;
    for (double[] fr : raw) {
      Vector vec = new RandomAccessSparseVector(String.valueOf(i++), fr.length);
      vec.assign(fr);
      points.add(new VectorWritable(vec));
    }
    return points;
  }
 
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  private static List<Vector> getPoints(double[][] raw) {
    List<Vector> points = new ArrayList<Vector>();
    int i = 0;
    for (double[] fr : raw) {
      Vector vec = new RandomAccessSparseVector(String.valueOf(i++), fr.length);
      vec.assign(fr);
      points.add(vec);
    }
    return points;
  }
 
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  private static List<VectorWritable> getPoints(double[][] raw) {
    List<VectorWritable> points = new ArrayList<VectorWritable>();
    int i = 0;
    for (double[] fr : raw) {
      Vector vec = new RandomAccessSparseVector(String.valueOf(i++), fr.length);
      vec.assign(fr);
      points.add(new VectorWritable(vec));
    }
    return points;
  }
 
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    assertEquals(m, mtt, 1.0e-9);
  }

  public void testMatrixTimesVector() throws Exception {
    Vector v = new RandomAccessSparseVector(50);
    v.assign(1.0);
    Matrix m = SolverTest.randomSequentialAccessSparseMatrix(100, 90, 50, 20, 1.0);
    DistributedRowMatrix dm = randomDistributedMatrix(100, 90, 50, 20, 1.0, false);

    Vector expected = m.times(v);
    Vector actual = dm.times(v);
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    assertEquals(0.0, expected.getDistanceSquared(actual), 1.0e-9);
  }

  public void testMatrixTimesSquaredVector() throws Exception {
    Vector v = new RandomAccessSparseVector(50);
    v.assign(1.0);
    Matrix m = SolverTest.randomSequentialAccessSparseMatrix(100, 90, 50, 20, 1.0);
    DistributedRowMatrix dm = randomDistributedMatrix(100, 90, 50, 20, 1.0, false);

    Vector expected = m.timesSquared(v);
    Vector actual = dm.timesSquared(v);
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        return;
      }
      Vector accumulator = new RandomAccessSparseVector(it.next().get());
      while (it.hasNext()) {
        Vector row = it.next().get();
        accumulator.assign(row, Functions.PLUS);
      }
      out.collect(rowNum, new VectorWritable(new SequentialAccessSparseVector(accumulator)));
    }
  }
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  private static List<VectorWritable> getPointsWritable() {
    List<VectorWritable> points = Lists.newArrayList();
    for (double[] fr : RAW) {
      Vector vec = new RandomAccessSparseVector(fr.length);
      vec.assign(fr);
      points.add(new VectorWritable(vec));
    }
    return points;
  }
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