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

Package org.apache.commons.math.optimization

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

org.apache.commons.math.optimization.SimpleRealPointChecker
Simple implementation of the {@link RealConvergenceChecker} interface usingonly point coordinates.
Convergence is considered to have been reached if either the relative difference between each point coordinate are smaller than a threshold or if either the absolute difference between the point coordinates are smaller than another threshold.
@version $Revision: 990655 $ $Date: 2010-08-29 23:49:40 +0200 (dim. 29 août 2010) $ @since 2.0

  @Test(expected = MaxEvaluationsExceededException.class)
  public void testMaxEvaluations() throws MathException {
      try {
          Powell powell = new Powell();
          NelderMead optimizer = new NelderMead();
          optimizer.setConvergenceChecker(new SimpleRealPointChecker(-1.0, 1.0e-3));
          optimizer.setMaxEvaluations(20);
          optimizer.optimize(powell, GoalType.MINIMIZE, new double[] { 3.0, -1.0, 0.0, 1.0 });
      } catch (FunctionEvaluationException fee) {
          if (fee.getCause() instanceof ConvergenceException) {
              throw (ConvergenceException) fee.getCause();

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  @Test(expected = MaxEvaluationsExceededException.class)
  public void testMaxEvaluations() throws MathException {
      try {
          Powell powell = new Powell();
          NelderMead optimizer = new NelderMead();
          optimizer.setConvergenceChecker(new SimpleRealPointChecker(-1.0, 1.0e-3));
          optimizer.setMaxEvaluations(20);
          optimizer.optimize(powell, GoalType.MINIMIZE, new double[] { 3.0, -1.0, 0.0, 1.0 });
      } catch (FunctionEvaluationException fee) {
          if (fee.getCause() instanceof ConvergenceException) {
              throw (ConvergenceException) fee.getCause();

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  @Test(expected = MaxEvaluationsExceededException.class)
  public void testMaxEvaluations() throws MathException {
      try {
          Powell powell = new Powell();
          NelderMead optimizer = new NelderMead();
          optimizer.setConvergenceChecker(new SimpleRealPointChecker(-1.0, 1.0e-3));
          optimizer.setMaxEvaluations(20);
          optimizer.optimize(powell, GoalType.MINIMIZE, new double[] { 3.0, -1.0, 0.0, 1.0 });
      } catch (FunctionEvaluationException fee) {
          if (fee.getCause() instanceof ConvergenceException) {
              throw (ConvergenceException) fee.getCause();

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org.apache.commons.math.optimization.direct.NelderMeadTest

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