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Commons Math example source code file (WeightedMeasurementTest.java)

This example Commons Math source code file (WeightedMeasurementTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Commons Math tags/keywords

deprecated, estimatedparameter, estimatedparameter, mymeasurement, override, override, testcase, weightedmeasurement, weightedmeasurement, weightedmeasurementtest, weightedmeasurementtest

The Commons Math WeightedMeasurementTest.java source code

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.commons.math.estimation;

import org.apache.commons.math.estimation.EstimatedParameter;
import org.apache.commons.math.estimation.WeightedMeasurement;

import junit.framework.*;

@Deprecated
public class WeightedMeasurementTest
  extends TestCase {

  public WeightedMeasurementTest(String name) {
    super(name);
    p1 = null;
    p2 = null;
  }

  public void testConstruction() {
    WeightedMeasurement m = new MyMeasurement(3.0, theoretical() + 0.1, this);
    checkValue(m.getWeight(), 3.0);
    checkValue(m.getMeasuredValue(), theoretical() + 0.1);
  }

  public void testIgnored() {
    WeightedMeasurement m = new MyMeasurement(3.0, theoretical() + 0.1, this);
    assertTrue(!m.isIgnored());
    m.setIgnored(true);
    assertTrue(m.isIgnored());
    m.setIgnored(false);
    assertTrue(!m.isIgnored());
  }

  public void testTheory() {
    WeightedMeasurement m = new MyMeasurement(3.0, theoretical() + 0.1, this);
    checkValue(m.getTheoreticalValue(), theoretical());
    checkValue(m.getResidual(), 0.1);

    double oldP1 = p1.getEstimate();
    p1.setEstimate(oldP1 + m.getResidual() / m.getPartial(p1));
    checkValue(m.getResidual(), 0.0);
    p1.setEstimate(oldP1);
    checkValue(m.getResidual(), 0.1);

    double oldP2 = p2.getEstimate();
    p2.setEstimate(oldP2 + m.getResidual() / m.getPartial(p2));
    checkValue(m.getResidual(), 0.0);
    p2.setEstimate(oldP2);
    checkValue(m.getResidual(), 0.1);

  }

  @Override
  public void setUp() {
    p1 = new EstimatedParameter("p1", 1.0);
    p2 = new EstimatedParameter("p2", 2.0);
  }

  @Override
  public void tearDown() {
    p1 = null;
    p2 = null;
  }

  private void checkValue(double value, double expected) {
   assertTrue(Math.abs(value - expected) < 1.0e-10);
  }

  private double theoretical() {
   return 3 * p1.getEstimate() - p2.getEstimate();
  }

  private double partial(EstimatedParameter p) {
    if (p == p1) {
      return 3.0;
    } else if (p == p2) {
      return -1.0;
    } else {
      return 0.0;
    }
  }

  private static class MyMeasurement
    extends WeightedMeasurement {

    public MyMeasurement(double weight, double measuredValue,
                         WeightedMeasurementTest testInstance) {
      super(weight, measuredValue);
      this.testInstance = testInstance;
    }

    @Override
    public double getTheoreticalValue() {
      return testInstance.theoretical();
    }

    @Override
    public double getPartial(EstimatedParameter p) {
      return testInstance.partial(p);
    }

    private transient WeightedMeasurementTest testInstance;

    private static final long serialVersionUID = -246712922500792332L;

  }

  private EstimatedParameter p1;
  private EstimatedParameter p2;

}

Other Commons Math examples (source code examples)

Here is a short list of links related to this Commons Math WeightedMeasurementTest.java source code file:

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