Examples of zSum()

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

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    v = lr.classify(new DenseVector(new double[]{0, 1}));
    assertEquals(1 / 3.0, v.get(0), 1.0e-3);
    assertEquals(1 / 3.0, v.get(1), 1.0e-3);

    v = lr.classifyFull(new DenseVector(new double[]{0, 1}));
    assertEquals(1.0, v.zSum(), 1.0e-8);
    assertEquals(1 / 3.0, v.get(0), 1.0e-3);
    assertEquals(1 / 3.0, v.get(1), 1.0e-3);
    assertEquals(1 / 3.0, v.get(2), 1.0e-3);

    // but the weights on the first component are non-zero
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Examples of org.apache.mahout.math.Vector.zSum()

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    v = lr.classify(new DenseVector(new double[]{1, 0}));
    assertEquals(Math.exp(-1) / (1 + Math.exp(-1) + Math.exp(-2)), v.get(0), 1.0e-8);
    assertEquals(Math.exp(-2) / (1 + Math.exp(-1) + Math.exp(-2)), v.get(1), 1.0e-8);

    v = lr.classifyFull(new DenseVector(new double[]{1, 0}));
    assertEquals(1.0, v.zSum(), 1.0e-8);
    assertEquals(1 / (1 + Math.exp(-1) + Math.exp(-2)), v.get(0), 1.0e-8);
    assertEquals(Math.exp(-1) / (1 + Math.exp(-1) + Math.exp(-2)), v.get(1), 1.0e-8);
    assertEquals(Math.exp(-2) / (1 + Math.exp(-1) + Math.exp(-2)), v.get(2), 1.0e-8);

    lr.setBeta(0, 1, 1);
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Examples of org.apache.mahout.math.Vector.zSum()

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    assertEquals(Math.exp(-2) / (1 + Math.exp(-1) + Math.exp(-2)), v.get(2), 1.0e-8);

    lr.setBeta(0, 1, 1);

    v = lr.classifyFull(new DenseVector(new double[]{1, 1}));
    assertEquals(1.0, v.zSum(), 1.0e-8);
    assertEquals(Math.exp(0) / (1 + Math.exp(0) + Math.exp(-2)), v.get(1), 1.0e-3);
    assertEquals(Math.exp(-2) / (1 + Math.exp(0) + Math.exp(-2)), v.get(2), 1.0e-3);
    assertEquals(1 / (1 + Math.exp(0) + Math.exp(-2)), v.get(0), 1.0e-3);

    lr.setBeta(1, 1, 3);
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Examples of org.apache.mahout.math.Vector.zSum()

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    assertEquals(1 / (1 + Math.exp(0) + Math.exp(-2)), v.get(0), 1.0e-3);

    lr.setBeta(1, 1, 3);

    v = lr.classifyFull(new DenseVector(new double[]{1, 1}));
    assertEquals(1.0, v.zSum(), 1.0e-8);
    assertEquals(Math.exp(0) / (1 + Math.exp(0) + Math.exp(1)), v.get(1), 1.0e-8);
    assertEquals(Math.exp(1) / (1 + Math.exp(0) + Math.exp(1)), v.get(2), 1.0e-8);
    assertEquals(1 / (1 + Math.exp(0) + Math.exp(1)), v.get(0), 1.0e-8);
  }
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Examples of org.apache.mahout.math.Vector.zSum()

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  /** @return the std */
  public double getStd() {
    if (getNumPoints() == 0) return std;
    Vector stds = pointSquaredTotal.times(getNumPoints()).minus(getPointTotal().times(getPointTotal()))
        .assign(new SquareRootFunction()).divide(getNumPoints());
    return stds.zSum() / stds.size();
  }
 
}
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Examples of org.apache.mahout.math.Vector.zSum()

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    v = lr.classify(new DenseVector(new double[]{0, 1}));
    assertEquals(1 / 3.0, v.get(0), 1.0e-3);
    assertEquals(1 / 3.0, v.get(1), 1.0e-3);

    v = lr.classifyFull(new DenseVector(new double[]{0, 1}));
    assertEquals(1.0, v.zSum(), 1.0e-8);
    assertEquals(1 / 3.0, v.get(0), 1.0e-3);
    assertEquals(1 / 3.0, v.get(1), 1.0e-3);
    assertEquals(1 / 3.0, v.get(2), 1.0e-3);

    // but the weights on the first component are non-zero
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Examples of org.apache.mahout.math.Vector.zSum()

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    v = lr.classify(new DenseVector(new double[]{1, 0}));
    assertEquals(Math.exp(-1) / (1 + Math.exp(-1) + Math.exp(-2)), v.get(0), 1.0e-8);
    assertEquals(Math.exp(-2) / (1 + Math.exp(-1) + Math.exp(-2)), v.get(1), 1.0e-8);

    v = lr.classifyFull(new DenseVector(new double[]{1, 0}));
    assertEquals(1.0, v.zSum(), 1.0e-8);
    assertEquals(1 / (1 + Math.exp(-1) + Math.exp(-2)), v.get(0), 1.0e-8);
    assertEquals(Math.exp(-1) / (1 + Math.exp(-1) + Math.exp(-2)), v.get(1), 1.0e-8);
    assertEquals(Math.exp(-2) / (1 + Math.exp(-1) + Math.exp(-2)), v.get(2), 1.0e-8);

    lr.setBeta(0, 1, 1);
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Examples of org.apache.mahout.math.Vector.zSum()

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    assertEquals(Math.exp(-2) / (1 + Math.exp(-1) + Math.exp(-2)), v.get(2), 1.0e-8);

    lr.setBeta(0, 1, 1);

    v = lr.classifyFull(new DenseVector(new double[]{1, 1}));
    assertEquals(1.0, v.zSum(), 1.0e-8);
    assertEquals(Math.exp(0) / (1 + Math.exp(0) + Math.exp(-2)), v.get(1), 1.0e-3);
    assertEquals(Math.exp(-2) / (1 + Math.exp(0) + Math.exp(-2)), v.get(2), 1.0e-3);
    assertEquals(1 / (1 + Math.exp(0) + Math.exp(-2)), v.get(0), 1.0e-3);

    lr.setBeta(1, 1, 3);
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Examples of org.apache.mahout.math.Vector.zSum()

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    assertEquals(1 / (1 + Math.exp(0) + Math.exp(-2)), v.get(0), 1.0e-3);

    lr.setBeta(1, 1, 3);

    v = lr.classifyFull(new DenseVector(new double[]{1, 1}));
    assertEquals(1.0, v.zSum(), 1.0e-8);
    assertEquals(Math.exp(0) / (1 + Math.exp(0) + Math.exp(1)), v.get(1), 1.0e-8);
    assertEquals(Math.exp(1) / (1 + Math.exp(0) + Math.exp(1)), v.get(2), 1.0e-8);
    assertEquals(1 / (1 + Math.exp(0) + Math.exp(1)), v.get(0), 1.0e-8);
  }
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Examples of org.apache.mahout.math.Vector.zSum()

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    int i = 0;
    Vector pdfs = new DenseVector(models.size());
    for (Cluster model : models) {
      pdfs.set(i++, model.pdf(new VectorWritable(data)));
    }
    return pdfs.assign(new TimesFunction(), 1.0 / pdfs.zSum());
  }
 
  @Override
  public void close(ClusterClassifier posterior) {
    for (Cluster cluster : posterior.getModels()) {
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