Package org.apache.commons.math.optimization

Examples of org.apache.commons.math.optimization.CostFunction

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  public NelderMeadTest(String name) {
    super(name);
  }

  public void testCostExceptions() throws ConvergenceException {
      CostFunction wrong =
          new CostFunction() {
            public double cost(double[] x) throws CostException {
                if (x[0] < 0) {
                    throw new CostException("{0}", new Object[] { "oops"});
                } else if (x[0] > 1) {
                    throw new CostException(new RuntimeException("oops"));
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  }

  public void testRosenbrock()
    throws CostException, ConvergenceException, NotPositiveDefiniteMatrixException {

    CostFunction rosenbrock =
      new CostFunction() {
        public double cost(double[] x) {
          ++count;
          double a = x[1] - x[0] * x[0];
          double b = 1.0 - x[0];
          return 100 * a * a + b * b;
 
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  }

  public void testPowell()
    throws CostException, ConvergenceException {

    CostFunction powell =
      new CostFunction() {
        public double cost(double[] x) {
          ++count;
          double a = x[0] + 10 * x[1];
          double b = x[2] - x[3];
          double c = x[1] - 2 * x[2];
 
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  public MultiDirectionalTest(String name) {
    super(name);
  }

  public void testCostExceptions() throws ConvergenceException {
      CostFunction wrong =
          new CostFunction() {
            public double cost(double[] x) throws CostException {
                if (x[0] < 0) {
                    throw new CostException("{0}", new Object[] { "oops"});
                } else if (x[0] > 1) {
                    throw new CostException(new RuntimeException("oops"));
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  }

  public void testRosenbrock()
    throws CostException, ConvergenceException {

    CostFunction rosenbrock =
      new CostFunction() {
        public double cost(double[] x) {
          ++count;
          double a = x[1] - x[0] * x[0];
          double b = 1.0 - x[0];
          return 100 * a * a + b * b;
 
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  }

  public void testPowell()
    throws CostException, ConvergenceException {

    CostFunction powell =
      new CostFunction() {
        public double cost(double[] x) {
          ++count;
          double a = x[0] + 10 * x[1];
          double b = x[2] - x[3];
          double c = x[1] - 2 * x[2];
 
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Related Classes of org.apache.commons.math.optimization.CostFunction

  • org.apache.commons.math.optimization.MultiDirectionalTest
  • org.apache.commons.math.optimization.NelderMeadTest
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