List of pointwiseProduct() Examples

Examples of pointwiseProduct()

aima.core.probability.Factor.pointwiseProduct()

Pointwise multiplication of this Factor by a given multiplier, creating a new Factor representing the product of the two.

see: AIMA3e Figure 14.10 page 527.

Note: Default Factor multiplication is not commutative. The reason is because the order of the variables comprising a Factor dictate the ordering of the values for that factor. The default order of the variables of the Factor returned is the order of the variables as they are seen, as read from the left to right term, for e.g.:

f₁(Y)f₂(X, Y)

would give a Factor of the following form:
Y, X

i.e. an ordered union of the variables from the two factors.
To override the default order of the product use pointwiseProductPOS(). @param multiplier @return a new Factor representing the pointwise product of this and thepassed in multiplier. The order of the variables comprising the product factor is the ordered union of the left term (this) and the right term (multiplier). @see Factor#pointwiseProductPOS(Factor,RandomVariable)

aima.core.probability.util.ProbabilityTable.pointwiseProduct()


  private Factor pointwiseProduct(List<Factor> factors) {


    Factor product = factors.get(0);
    for (int i = 1; i < factors.size(); i++) {
      product = product.pointwiseProduct(factors.get(i));
    }


    return product;
  }
}

    // Not commutative
    Assert.assertArrayEquals(new double[] { 3.0, 7.0, 6.0, 14.0, 9.0, 21.0,
        12.0, 28.0 }, xyD.pointwiseProduct(zD).getValues(),
        DELTA_THRESHOLD);
    Assert.assertArrayEquals(new double[] { 3.0, 6.0, 9.0, 12.0, 7.0, 14.0,
        21.0, 28.0 }, zD.pointwiseProduct(xyD).getValues(),
        DELTA_THRESHOLD);
  }


  @Test
  public void test_pointwiseProductPOS() {

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Examples of pointwiseProduct()

Examples of aima.core.probability.Factor.pointwiseProduct()

Examples of aima.core.probability.util.ProbabilityTable.pointwiseProduct()